Space Exploration Archives

September 5, 2014December 23, 2015 by Ken Kremer

MAVEN Mars Orbiter Ideally Poised to Uniquely Map Comet Siding Spring Composition – Exclusive Interview with Principal Investigator Bruce Jakosky

MAVEN is NASA’s next Mars Orbiter and will investigate how the planet lost most of its atmosphere and water over time. Credit: NASA

MAVEN to conduct up close observations of Comet Siding Spring during Oct. 2014
MAVEN is NASA’s next Mars Orbiter and will investigate how the planet lost most of its atmosphere and water over time. Credit: NASA
Story updated[/caption]

NASA’s MAVEN Mars Orbiter is “ideally” instrumented to uniquely “map the composition of Comet Siding Spring” in great detail when it streaks past the Red Planet during an extremely close flyby on Oct. 19, 2014 – thereby providing a totally “unexpected science opportunity … and a before and after look at Mars atmosphere,” Prof. Bruce Jakosky, MAVEN’s Principal Investigator of CU-Boulder, CO, told Universe Today in an exclusive interview.

The probes state-of-the-art ultraviolet spectrograph will be the key instrument making the one-of-a-kind compositional observations of this Oort cloud comet making its first passage through the inner solar system on its millions year orbital journey.

“MAVEN’s Imaging Ultraviolet Spectrograph (IUVS) is the ideal way to observe the comet coma and tail,” Jakosky explained.

“The IUVS can do spectroscopy that will allow derivation of compositional information.”

“It will do imaging of the entire coma and tail, allowing mapping of composition.”

Comet: Siding Spring. The images above show -- before and after filtering -- comet C/2013 A1, also known as Siding Spring, as captured by Wide Field Camera 3 on NASA's Hubble Space Telescope. Image Credit: NASA, ESA, and J.-Y. Li (Planetary Science Institute) — Comet: Siding Spring
The images above show — before and after filtering — comet C/2013 A1, also known as Siding Spring, as captured by Wide Field Camera 3 on NASA’s Hubble Space Telescope. Image Credit: NASA, ESA, and J.-Y. Li (Planetary Science Institute)

Moreover the UV spectrometer is the only one of its kind amongst NASA’s trio of Martian orbiters making its investigations completely unique.

“IUVS is the only ultraviolet spectrometer that will be observing the comet close up, and that gives the detailed compositional information,” Jakosky elaborated

And MAVEN, or the Mars Atmosphere and Volatile Evolution, is arriving just in the nick of time to fortuitously capture this fantastically rich data set of a pristine remnant from the solar system’s formation.

The spacecraft reaches Mars in less than 15 days. It will rendezvous with the Red Planet on Sept. 21 after a 10 month interplanetary journey from Earth.

Furthermore, since MAVEN’s purpose is the first ever detailed study of Mars upper atmosphere, it will get a before and after look at atmospheric changes.

“We’ll take advantage of this unexpected science opportunity to make observations both of the comet and of the Mars upper atmosphere before and after the comet passage – to look for any changes,” Jakosky stated.

How do MAVEN’s observations compare to NASA’s other orbiters Mars Odyssey (MO) and Mars Reconnaissance Orbiter (MRO), I asked?

“The data from the other orbiters will be complementary to the data from IUVS.”

“Visible light imaging from the other orbiters provides data on the structure of dust in the coma and tail. And infrared imaging provides information on the dust size distribution.”

IUVS is one of MAVENS’s nine science sensors in three instrument suites targeted to study why and exactly when did Mars undergo the radical climatic transformation.

How long will MAVEN make observations of Comet C/2013 A1 Siding Spring?

“We’ll be using IUVS to look at the comet itself, about 2 days before comet nucleus closest approach.”

“In addition, for about two days before and two days after nucleus closest approach, we’ll be using one of our “canned” sequences to observe the upper atmosphere and solar-wind interactions.”

“This will give us a detailed look at the upper atmosphere both before and after the comet, allowing us to look for differences.”

Describe the risk that Comet Siding Spring poses to MAVEN, and the timing?

“We have the encounter with Comet Siding Spring about 2/3 of the way through the commissioning phase we call transition.”

“We think that the risk to the spacecraft from comet dust is minimal, but we’ll be taking steps to reduce the risk even further so that we can move on toward our science mission.”

“Throughout this entire period, though, spacecraft and instrument health and safety come first.”

This graphic depicts the orbit of comet C/2013 A1 Siding Spring as it swings around the sun in 2014. On Oct. 19, 2014 the comet will have a very close pass at Mars. Its nucleus will miss Mars by about 82,000 miles (132,000 kilometers). Credit: NASA/JPL-Caltech

What’s your overall hope and expectation from the comet encounter?

“Together [with the other orbiters], I’m hoping it will all provide quite a data set!

“From Mars, the comet truly will fill the sky!” Jakosky gushed.

The comet’s nucleus will fly by Mars at a distance of only about 82,000 miles (132,000 kilometers) at 2:28 p.m. ET (18:28 GMT) on Oct. 19, 2014. That’s barely 1/3 the distance from the Earth to the Moon.

What’s the spacecraft status today?

“Everything is on track.”

Maven spacecraft trajectory to Mars. Credit: NASA — Maven spacecraft trajectory to Mars on Sept. 4, 2014. Credit: NASA

The $671 Million MAVEN spacecraft’s goal is to study Mars upper atmosphere to explore how the Red Planet lost most of its atmosphere and water over billions of years and the transition from its ancient, water-covered past, to the cold, dry, dusty world that it has become today.

MAVEN soared to space over nine months ago on Nov. 18, 2013 following a flawless blastoff from Cape Canaveral Air Force Station’s Space Launch Complex 41 atop a powerful Atlas V rocket and thus began a 10 month interplanetary voyage from Earth to the Red Planet.

It is streaking to Mars along with ISRO’s MOM orbiter, which arrives a few days later on September 24, 2014.

So far it has traveled 95% of the distance to the Red Planet, amounting to over 678,070,879 km (421,332,902 mi).

As of Sept. 4, MAVEN was 205,304,736 km (127,570,449 miles) from Earth and 4,705,429 km (2,923,818 mi) from Mars. Its Earth-centered velocity is 27.95 km/s (17.37 mi/s or 62,532 mph) and Sun-centered velocity is 22.29 km/s (13.58 mi/s or 48,892 mph) as it moves on its heliocentric arc around the Sun.

One-way light time from MAVEN to Earth is 11 minutes and 24 seconds.

MAVEN is NASA’s next Mars orbiter and launched on Nov. 18, 2014 from Cape Canaveral, Florida. It will study the evolution of the Red Planet’s atmosphere and climate. Universe Today visited MAVEN inside the clean room at the Kennedy Space Center. With solar panels unfurled, this is exactly how MAVEN looks when flying through space and circling Mars and observing Comet Siding Spring. Credit: Ken Kremer/kenkremer.com

Stay tuned here for Ken’s continuing MAVEN, MOM, Rosetta, Opportunity, Curiosity, Mars rover and more Earth and planetary science and human spaceflight news.

Ken Kremer

NASA’s Mars bound MAVEN spacecraft launches atop Atlas V booster at 1:28 p.m. EST from Space Launch Complex 41 at Cape Canaveral Air Force Station on Nov. 18, 2013. Image taken from the roof of the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center. Credit: Ken Kremer/kenkremer.com

September 5, 2014December 23, 2015 by Elizabeth Howell

Space Station’s Robonaut 2 Is Getting More Astronaut-Like By The Day

NASA’s large space station robot now has legs and a plan to (eventually) head outside to do spacewalks, to replace some of the more routine tasks taken on by astronauts. Robonaut 2 has actually been on the International Space Station since 2011, but only received the extra appendages in the past few days.

The robot is capable of flipping switches, moving covers and with the legs, clamping on to spots around the station. Check out the videos below to see some of the stuff that it is already capable of. It’s both creepy and amazing to watch.

September 3, 2014December 23, 2015 by Elizabeth Howell

ExoMars Hunting: Where Should The European Rover Land?

An artist's conception of the European Space Agency's ExoMars rover, scheduled to launch in 2018. Credit: ESA

Picking a landing site on Mars is a complex process. There’s the need to balance scientific return with the capabilities of whatever vehicle you’re sending out there. And given each mission costs millions (sometimes billions) of dollars — and you only get one shot at landing — you can bet mission planners are extra-cautious about choosing the right location.

A recent paper in Eos details just how difficult it is to choose where to put down a rover, with reference to the upcoming European ExoMars mission that will launch in 2018.

In March, scientists came together to select the first candidate landing sites and came up with four finalist locations. The goal of ExoMars is to look for evidence of life (whether past or present) and one of its defining features is a 2-meter (6.6-foot) drill that will be able to bore below the surface, something that the NASA Curiosity rover does not possess.

“Among the highest-priority sites are those with subaqueous sediments or hydrothermal deposits,” reads the paper, which was written by Bradley Thomson and Farouk El-Baz (both of Boston University). Of note, El-Baz was heavily involved in landing site selection for the Apollo missions.

Curiosity snaps selfie at Kimberley waypoint with towering Mount Sharp backdrop on April 27, 2014 (Sol 613). Inset shows MAHLI camera image of rovers mini-drill test operation on April 29, 2014 (Sol 615) into “Windjama” rock target at Mount Remarkable butte. MAHLI color photo mosaic assembled from raw images snapped on Sol 613, April 27, 2014. Credit: NASA/JPL/MSSS/Marco Di Lorenzo/Ken Kremer - kenkremer.com — Curiosity snaps selfie at Kimberley waypoint with towering Mount Sharp backdrop on April 27, 2014 (Sol 613). Inset shows MAHLI camera image of rovers mini-drill test operation on April 29, 2014 (Sol 615) into “Windjama” rock target at Mount Remarkable butte. MAHLI color photo mosaic assembled from raw images snapped on Sol 613, April 27, 2014. Credit: NASA/JPL/MSSS/Marco Di Lorenzo/Ken Kremer – kenkremer.com

“For example,” the paper continues, “some of the clearest morphological indicators of past aqueous activity are channel deposits indicative of past fluvial activity or the terminal fan, or delta deposits present within basins.”

But no landing site selection is perfect. The scientists note that Curiosity, for all of its successes, seems unlikely to achieve its primary science objectives in its two-year mission because the commissioning phase took a while, and the rover moves relatively slowly.

That said, NASA has argued that the rover achieved its goal of finding past habitable environments already, with discoveries such as extensive evidence of a past potentially life-bearing lake now called Yellowknife Bay.

Outcrops in Yellowknife Bay are being exposed by wind driven erosion. These rocks record superimposed ancient lake and stream deposits that offered past environmental conditions favorable for microbial life. This image mosaic from the Mast Camera instrument on NASA's Curiosity Mars rover shows a series of sedimentary deposits in the Glenelg area of Gale Crater, from a perspective in Yellowknife Bay looking toward west-northwest. The "Cumberland" rock that the rover drilled for a sample of the Sheepbed mudstone deposit (at lower left in this scene) has been exposed at the surface for only about 80 million years. Credit: NASA/JPL-Caltech/MSSS — Outcrops in Yellowknife Bay are being exposed by wind driven erosion. These rocks record superimposed ancient lake and stream deposits that offered past environmental conditions favorable for microbial life. This image mosaic from the Mast Camera instrument on NASA’s Curiosity Mars rover shows a series of sedimentary deposits in the Glenelg area of Gale Crater, from a perspective in Yellowknife Bay looking toward west-northwest. The “Cumberland” rock that the rover drilled for a sample of the Sheepbed mudstone deposit (at lower left in this scene) has been exposed at the surface for only about 80 million years. Credit: NASA/JPL-Caltech/MSSS

What could change the area of the landing could be using different types of entry, descent and landing technologies, the authors add. If the parachute opened depending on how far the spacecraft was from the ground — instead of how fast it was going — this could make the landing ellipse smaller.

This could place the rover “closer to targets of interest that are too rough for a direct landing and reducing necessary traverse distances,” the paper says.

You can read the paper in its entirety at this link, which also goes over the history of selecting landing sites for the Apollo missions as well as the Mars Exploration Rovers (Spirit and Opportunity).

September 3, 2014December 23, 2015 by Elizabeth Howell

Memory Problems On Mars Will Force Opportunity Rover Reformat From Earth

A raw shot from the front hazcam of NASA's Opportunity rover taken on Sol 3757, on Aug. 19, 2014. Credit: NASA/JPL-Caltech

NASA’s Opportunity rover, which has been roaming Mars for more than 10 Earth years, requires a flash memory reformat to keep doing science on the Red Planet, the agency wrote in an update Aug. 29 along with its intentions for making that possible quickly.

“Flash-memory induced resets have increased in occurrence, preventing meaningful science until this problem can be corrected,” NASA said on the Opportunity website. “The project is developing plans to reformat the flash file system to correct the problem.”

The agency has experience in doing this procedure as they successfully ran it on the twin Spirit rover five years ago, before the rover got stuck in sand and died. A separate update on the Jet Propulsion Laboratory website noted there have been more than a dozen incidents on Opportunity in the past month, and it takes a day or two to recover from each one.

Flash memory, the update added, is useful because data remains on the rover even if it is turned off. But after 10 years of using the cells on Opportunity’s flash memory, the agency suspects that these cells are starting to wear out. “Reformatting clears the memory while identifying bad cells and flagging them to be avoided,” the update read.

The crest of Endeavour Crater is at the horizon of this picture taken by the Opportunity rover from Mars on Sol 3,749 (Aug. 10, 2014). Credit: NASA/JPL-Caltech

The procedure will take place early this month. Meanwhile, NASA is flushing the flash memory by sending the data back to Earth — as well as switching the rover to a mode where it doesn’t use flash memory. Just in case the rover resets itself during the procedure, NASA is also changing up Opportunity’s communications to send data more slowly (which makes the rover more resilient to problems, the agency said.)

“The flash reformatting is a low-risk process, as critical sequences and flight software are stored elsewhere in other non-volatile memory on the rover,” stated JPL’s John Callas, project manager for NASA’s Mars Exploration Rover Project.

Opportunity is currently circling the ring of Endeavour crater and is in otherwise excellent health, NASA said. The rover has driven 25.28 miles (40.69 kilometers) since arriving on Mars in January 2004 for what was supposed to be a 90-day mission.

September 2, 2014December 23, 2015 by Elizabeth Howell

Here’s Your Chance To Send A Message To An Asteroid

NASA is planning to launch a time capsule aboard the Origins-Spectral Interpretation-Resource Identification-Security-Regolith Explorer (OSIRIS-REx) spacecraft, which is expected to head to an asteroid in 2016. Credit: Heather Roper/University of Arizona/OSIRIS-REx

What’s your vision for solar system exploration? And how cool would it be to send it literally into the solar system?

NASA is offering its fans the chance to compose a tweet or send a picture showing how we can step out into the cosmos. The best ones among these will be placed aboard a spacecraft that will zoom to an asteroid in 2016.

The “time capsule” will be placed aboard the Origins-Spectral Interpretation-Resource Identification-Security-Regolith Explorer (OSIRIS-REx). If all goes to plan, it will meet with the asteroid Bennu in 2019, pick up a sample and then return it to Earth in 2023.

And by the way, you can also send your name to Bennu via this form (a joint initiative of NASA and the Planetary Society.) Seems a good chance to get your name off of Earth, until the time when space travel becomes affordable to ordinary citizens.

For more details about the tweets and images time capsule, visit this NASA website. Make sure to submit your message before Sept. 30.

Source: NASA

September 1, 2014December 23, 2015 by Ken Kremer

Rosetta Now Up Close to Comet 67P – Snapping Mapping Mosaics for Momentous Philae Landing

Four-image photo mosaic comprising images taken by Rosetta’s navigation camera on 31 August 2014 from a distance of 61 km from comet 67P/Churyumov-Gerasimenko. The mosaic has been contrast enhanced to bring out details. The comet nucleus is about 4 km across.
Credits: ESA/Rosetta/NAVCAM/Ken Kremer – kenkremer.com/Marco Di Lorenzo
See rotated version and 4 individual images below[/caption]

ESA’s Rosetta orbiter has now moved in so close to its comet quarry that the primordial body overwhelms the screen, and thus its snapping mapping mosaics to capture the complete scene of the bizarre world so it can find the most suitable spot for the momentous Philae landing – upcoming in mid-November.

In fact Rosetta has ‘drawn and quartered’ the comet to collect high resolution views of Comet 67P/Churyumov-Gerasimenko with the navcam camera on Sunday, August 31.

The navcam quartet has just been posted to the Rosetta portal today, Monday, September 1, 2014. ESA invited readers to create global photo mosaics.

See above our four frame photo mosaic of navcam images Rosetta took on Aug. 31.

The purpose of taking the images as well as spectra and physical measurements up close is to find a ‘technically feasible’ Philae touchdown site that is both safe and scientifically interesting.

Below is the Rosetta teams four image navcam montage, arranged individually in a 2 x 2 raster.

Four-image montage comprising images taken by Rosetta's navigation camera on 31 August 2014 from a distance of 61 km from comet 67P/Churyumov-Gerasimenko. The comet nucleus is about 4 km across. Credits: ESA/Rosetta/NAVCAM — Four-image montage comprising images taken by Rosetta’s navigation camera on 31 August 2014 from a distance of 61 km from comet 67P/Churyumov-Gerasimenko. The comet nucleus is about 4 km across. Credits: ESA/Rosetta/NAVCAM

The navcam image raster sequence was taken from a distance of 61 km from comet 67P.

“Roughly one quarter of the comet is seen in the corner of each of the four images. The four images are taken over an approximately 20 minute period, meaning that there is some motion of the spacecraft and rotation of the comet between the images. As a result, making a clean mosaic out of the four images is not simple,” according to ESA’s Rosetta blog.

As I reported here last week, the ‘Top 5’ landing site candidates have been chosen for the Rosetta orbiters piggybacked Philae lander for humankind’s first attempt to land on a comet.

The potential touchdown sites were announced on Aug. 25, based on a thorough analysis of high resolution measurements collected by ESA’s Rosetta spacecraft over the prior weeks since it arrived at the pockmarked Comet 67P/Churyumov-Gerasimenko on Aug. 6, 2014.

See our montage of the ‘Top 5’ landing sites below.

Five candidate sites were identified on Comet 67P/Churyumov-Gerasimenko for Rosetta’s Philae lander. The approximate locations of the five regions are marked on these OSIRIS narrow-angle camera images taken on 16 August 2014 from a distance of about 100 km. Enlarged insets below highlight 5 landing zones. Credits: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA Processing: Marco Di Lorenzo/Ken Kremer

Rosetta is a mission of many firsts, including history’s first ever attempt to orbit a comet for long term study.

Philae’s history making landing on comet 67P is currently scheduled for around Nov. 11, 2014, and will be entirely automatic. The 100 kg lander is equipped with 10 science instruments.

The new images released today are the best taken so far by the Navcam camera. The probes OSIRIS science camera are even more detailed, and will hopefully be released by ESA soon!

“This is the first time landing sites on a comet have been considered,” said Stephan Ulamec, Lander Manager at DLR (German Aerospace Center), in an ESA statement.

Since rendezvousing with the comet after a decade long chase of over 6.4 billion kilometers (4 Billion miles), a top priority task for the science and engineering team leading Rosetta has been “Finding a landing strip” for the Philae comet lander.

“The clock is ticking’ to select a suitable landing zone soon since the comet warms up and the surface becomes ever more active as it swings in closer to the sun and makes the landing ever more hazardous.

This image of comet 67P/Churyumov-Gerasimenko shows the diversity of surface structures on the comet's nucleus. It was taken by the Rosetta spacecraft's OSIRIS narrow-angle camera on August 7, 2014. At the time, the spacecraft was 65 miles (104 kilometers) away from the 2.5 mile (4 kilometer) wide nucleus. Credit: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA/Enhanced processing Marco Di Lorenzo/Ken Kremer — This image of comet 67P/Churyumov-Gerasimenko shows the diversity of surface structures on the comet’s nucleus. It was taken by the Rosetta spacecraft’s OSIRIS narrow-angle camera on August 7, 2014. At the time, the spacecraft was 65 miles (104 kilometers) away from the 2.5 mile (4 kilometer) wide nucleus. Credit: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA/Enhanced processing Marco Di Lorenzo/Ken Kremer

The three-legged lander will fire two harpoons and use ice screws to anchor itself to the 4 kilometer (2.5 mile) wide comet’s surface. Philae will collect stereo and panoramic images and also drill 23 centimeters into and sample its incredibly varied surface.

Stay tuned here for Ken’s continuing Rosetta, Earth and Planetary science and human spaceflight news.

Ken Kremer

ESA’s Rosetta spacecraft on final approach to Comet 67P/Churyumov-Gerasimenko in early August 2014. This collage of navcam imagery from Rosetta was taken on Aug. 1, 2, 3 and 4 from distances of 1026 km, 500 km, 300 km and 234 km. Not to scale. Credit: ESA/Rosetta/NAVCAM - Collage/Processing: Marco Di Lorenzo/Ken Kremer- kenkremer.com — ESA’s Rosetta spacecraft on final approach to Comet 67P/Churyumov-Gerasimenko in early August 2014. This collage of navcam imagery from Rosetta was taken on Aug. 1, 2, 3 and 4 from distances of 1026 km, 500 km, 300 km and 234 km. Not to scale. Credit: ESA/Rosetta/NAVCAM – Collage/Processing: Marco Di Lorenzo/Ken Kremer- kenkremer.com

Read my Rosetta series here:

5 Landing Site Candidates Selected for Rosetta’s Historic Philae Comet Lander

Rosetta Moving Closer to Comet 67P Hunting for Philae Landing Site

What’s Ahead for Rosetta – ‘Finding a Landing Strip’ on Bizarre Comet 67P/Churyumov-Gerasimenko

Rosetta Arrives at ‘Scientific Disneyland’ for Ambitious Study of Comet 67P/Churyumov-Gerasimenko after 10 Year Voyage

Rosetta on Final Approach to Historic Comet Rendezvous – Watch Live Here

Rosetta Probe Swoops Closer to Comet Destination than ISS is to Earth and Reveals Exquisite Views

Rosetta Orbiter less than 500 Kilometers from Comet 67P Following Penultimate Trajectory Burn

Rosetta Closing in on Comet 67P/Churyumov-Gerasimenko after Decade Long Chase

August 31, 2014December 23, 2015 by Ken Kremer

25 Days from Mars – India’s MOM is in Good Health!

India’s Mars Orbiter Mission (MOM) marked 100 days out from Mars on June 16, 2014 and the Mars Orbit Insertion engine firing when it arrives at the Red Planet on September 24, 2014 after its 10 month interplanetary journey. Credit ISRO

Now less than 25 days from her history making rendezvous with the Red Planet and the critical Mars Orbital Insertion (MOI) engine firing, India’s MOM is in good health!

The Mars Orbiter Mission, or MOM, counts as India’s first interplanetary voyager and the nation’s first manmade object to orbit the 4th rock from our Sun on September 24, 2014 – if all goes well.

MOM was designed and developed by the Indian Space Research Organization (ISRO).

“MOM and its payloads are in good health,” reports ISRO in a new update.

As of today, Aug. 31, MOM has traveled a total distance of over 622 million km in its heliocentric arc towards Mars, says ISRO. It is currently 199 million km away from Earth.

25 Days to Mars Orbit Insertion engine firing for ISRO’s Mars Orbiter Mission (MOM) on Sept. 24, 2014. Prelaunch images show MOM undergoing solar panel illumination tests during 2013 prior to launch. Credit: ISRO

Altogether the probe has completed over 90% of the journey to Mars.

In the past week alone it has traveled over 20 million km and is over 10 million km further from Earth. It is now less than 9 million kilometers away from Mars

Round trip radio signals communicating with MOM now take some 21 minutes.

The 1,350 kilogram (2,980 pound) probe has been streaking through space for nearly ten months.

To remain healthy and accomplish her science mission ahead, the spacecraft must fire the 440 Newton liquid fueled main engine to brake into orbit around the Red Planet on September 24, 2014 – where she will study the atmosphere and sniff for signals of methane.

The do or die MOI burn on September 24, 2014 places MOM into an 377 km x 80,000 km elliptical orbit around Mars.

Trans Mars Injection (TMI), carried out on Dec 01, 2013 at 00:49 hrs (IST) has moved the spacecraft in the Mars Transfer Trajectory (MTT). With TMI the Earth orbiting phase of the spacecraft ended and the spacecraft is now on a course to encounter Mars after a journey of about 10 months around the Sun. Credit: ISRO — Trans Mars Injection (TMI), carried out on Dec 01, 2013 at 00:49 hrs (IST) moved the spacecraft into the Mars Transfer Trajectory (MTT). With TMI the Earth orbiting phase of the spacecraft ended and the spacecraft is now on a course to encounter Mars after a journey of about 10 months around the Sun. Credit: ISRO

MOM was launched on Nov. 5, 2013 from India’s spaceport at the Satish Dhawan Space Centre, Sriharikota, atop the nations indigenous four stage Polar Satellite Launch Vehicle (PSLV) which placed the probe into its initial Earth parking orbit.

MOM is streaking to Mars along with NASA’s MAVEN orbiter, which arrives a few days earlier on September 21, 2014.

Although MOM’s main objective is a demonstration of technological capabilities, she will also study the planet’s atmosphere and surface.

The probe is equipped with five indigenous instruments to conduct meaningful science – including a tri color imager (MCC) and a methane gas sniffer (MSM) to study the Red Planet’s atmosphere, morphology, mineralogy and surface features. Methane on Earth originates from both geological and biological sources – and could be a potential marker for the existence of Martian microbes.

Stay tuned here for Ken’s continuing MOM, MAVEN, Rosetta, Opportunity, Curiosity, Mars rover and more Earth and planetary science and human spaceflight news.

Ken Kremer

Clouds on the ground ! The sky seems inverted for a moment ! Blastoff of India’s Mars Orbiter Mission (MOM) on Nov. 5, 2013 from the Indian Space Research Organization’s (ISRO) Satish Dhawan Space Centre SHAR, Sriharikota. Credit: ISRO

August 30, 2014December 23, 2015 by Ken Kremer

Heat Protecting Back Shell Tiles Installed on NASA’s Orion EFT-1 Spacecraft Set for Dec. 2014 Launch

Inside the Operations and Checkout Building high bay at NASA's Kennedy Space Center in Florida, technicians dressed in clean-room suits install a back shell tile panel onto the Orion crew module. Credit: NASA/Dimitri Gerondidakis

Fabrication of the pathfinding version of NASA’s Orion crew capsule slated for its inaugural unmanned test flight in December is entering its final stages at the Kennedy Space Center (KSC) launch site in Florida.

Engineers and technicians have completed the installation of Orion’s back shell panels which will protect the spacecraft and future astronauts from the searing heat of reentry and scorching temperatures exceeding 3,150 degrees Fahrenheit.

Orion is scheduled to launch on its maiden uncrewed mission dubbed Exploration Flight Test-1 (EFT-1) test flight in December 2014 atop the mammoth, triple barreled United Launch Alliance (ULA) Delta IV Heavy rocket from Cape Canaveral, Florida.

Inside the Operations and Checkout Building high bay at NASA's Kennedy Space Center in Florida, technicians dressed in clean-room suits have installed a back shell tile panel onto the Orion crew module and are checking the fit next to the middle back shell tile panel. Preparations are underway for Exploration Flight Test-1, or EFT-1. Credit: NASA/Dimitri Gerondidakis — Inside the Operations and Checkout Building high bay at NASA’s Kennedy Space Center in Florida, technicians dressed in clean-room suits have installed a back shell tile panel onto the Orion crew module and are checking the fit next to the middle back shell tile panel. Preparations are underway for Exploration Flight Test-1, or EFT-1. Credit: NASA/Dimitri Gerondidakis

The cone-shaped back shell actually has a rather familiar look since its comprised of 970 black thermal protection tiles – the same tiles which protected the belly of the space shuttles during three decades and 135 missions of returning from space.

However, Orion’s back shell tiles will experience temperatures far in excess of those from the shuttle era. Whereas the space shuttles traveled at 17,000 miles per hour, Orion will hit the Earth’s atmosphere at some 20,000 miles per hour on this first flight test.

The faster a spacecraft travels through Earth’s atmosphere, the more heat it generates. So even though the hottest the space shuttle tiles got was about 2,300 degrees Fahrenheit, the Orion back shell could get up to 3,150 degrees, despite being in a cooler area of the vehicle.

Engineers have also rigged Orion to conduct a special in flight test to see just how vulnerable the vehicle is to the onslaught of micrometeoroid orbital debris.

Two one-inch-wide holes have been drilled into tiles on Orion’s back shell to simulate micrometeoroid orbital debris damage. Sensors on the vehicle will record how high temperatures climb inside the hole during Orion’s return through Earth’s atmosphere following its first flight in December. Credit: NASA

Even tiny particles can cause immense and potentially fatal damage at high speed by punching a hole through the back shell tiles and possibly exposing the spacecrafts structure to temperatures high than normal.

“Below the tiles, the vehicle’s structure doesn’t often get hotter than about 300 degrees Fahrenheit, but if debris breeched the tile, the heat surrounding the vehicle during reentry could creep into the hole it created, possibly damaging the vehicle,” says NASA.

The team has run done numerous modeling studies on the effect of micrometeoroid hits. Now it’s time for a real world test.

Therefore engineers have purposely drilled a pair of skinny 1 inch wide holes into two 1.47 inches thick tiles to mimic damage from a micrometeoroid hit. The holes are 1.4 inches and 1 inch deep and are located on the opposite side of the back shell from Orion’s windows and reaction control system jets, according to NASA.

“We want to know how much of the hot gas gets into the bottom of those cavities,” said Joseph Olejniczak, manager of Orion aerosciences, in a NASA statement.

“We have models that estimate how hot it will get to make sure it’s safe to fly, but with the data we’ll gather from these tiles actually coming back through Earth’s atmosphere, we’ll make new models with higher accuracy.”

Orion crew module back shell tiles and panels inside the Neil Armstrong Operations and Checkout Building high bay at the Kennedy Space Center in Florida. Credit: Ken Kremer - kenkremer.com — Orion crew module back shell tiles and panels inside the Neil Armstrong Operations and Checkout Building high bay at the Kennedy Space Center in Florida. Credit: Ken Kremer – kenkremer.com

The data gathered will help inform the team about the heat effects from potential damage and possible astronaut repair options in space.

Orion is NASA’s next generation human rated vehicle now under development to replace the now retired space shuttle.

The state-of-the-art spacecraft will carry America’s astronauts on voyages venturing farther into deep space than ever before – past the Moon to Asteroids, Mars and Beyond!

The two-orbit, four and a half hour EFT-1 flight will lift the Orion spacecraft and its attached second stage to an orbital altitude of 3,600 miles, about 15 times higher than the International Space Station (ISS) – and farther than any human spacecraft has journeyed in 40 years.

The EFT-1 mission will test the systems critical for future human missions to deep space.

Orion’s back shell attachment and final assembly is taking place in the newly renamed Neil Armstrong Operations and Checkout Building, by prime contractor Lockheed Martin.

Inside the Operations and Checkout Building high bay at the Kennedy Space Center, Fl, technicians on work platform monitor progress as crane lowers the middle back shell tile panel for installation on the Orion crew module. Credit: NASA/Dimitri Gerondidakis

One of the primary goals of NASA’s eagerly anticipated Orion EFT-1 uncrewed test flight is to test the efficacy of the heat shield and back shell tiles in protecting the vehicle – and future human astronauts – from excruciating temperatures reaching over 4000 degrees Fahrenheit (2200 C) during scorching re-entry heating.

At the conclusion of the EFT-1 flight, the detached Orion capsule plunges back and re-enters the Earth’s atmosphere at 20,000 MPH (32,000 kilometers per hour).

“That’s about 80% of the reentry speed experienced by the Apollo capsule after returning from the Apollo moon landing missions,” Scott Wilson, NASA’s Orion Manager of Production Operations at KSC, told me during an interview at KSC.

A trio of parachutes will then unfurl to slow Orion down for a splashdown in the Pacific Ocean.

The Orion EFT-1 vehicle is due to roll out of the O & C in about two weeks and be moved to its fueling facility at KSC for the next step in launch processing.

Orion will eventually launch atop the SLS, NASA’s new mammoth heavy lift booster which the agency is now targeting for its maiden launch no later than November 2018 – detailed in my story here.

Stay tuned here for Ken’s continuing Orion, SLS, Boeing, Sierra Nevada, Orbital Sciences, SpaceX, commercial space, Curiosity, Mars rover, MAVEN, MOM and more Earth and planetary science and human spaceflight news.

Ken Kremer

August 28, 2014December 23, 2015 by Ken Kremer

US Heavy Lift Mars Rocket Passes Key Review and NASA Sets 2018 Maiden Launch Date

Looking to the future of space exploration, NASA and TopCoder have launched the "High Performance Fast Computing Challenge" to improve the performance of their Pleiades supercomputer. Credit: NASA/MSFC

Artist concept of NASA’s Space Launch System (SLS) 70-metric-ton configuration launching to space. SLS will be the most powerful rocket ever built for deep space missions, including to an asteroid and ultimately to Mars. Credit: NASA/MSFC
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After a thorough review of cost and engineering issues, NASA managers formally approved the development of the agency’s mammoth heavy lift rocket – the Space Launch System or SLS – which will be the world’s most powerful rocket ever built and is intended to take astronauts farther beyond Earth into deep space than ever before possible – to Asteroids and Mars.

The maiden test launch of the SLS is targeted for November 2018 and will be configured in its initial 70-metric-ton (77-ton) version, top NASA officials announced at a briefing for reporters on Aug. 27.

On its first flight known as EM-1, the SLS will also loft an uncrewed Orion spacecraft on an approximately three week long test flight taking it beyond the Moon to a distant retrograde orbit, said William Gerstenmaier, associate administrator for the Human Explorations and Operations Mission Directorate at NASA Headquarters in Washington, at the briefing.

Previously NASA had been targeting Dec. 2017 for the inaugural launch from the Kennedy Space Center in Florida – a slip of nearly one year.

But the new Nov. 2018 target date is what resulted from the rigorous assessment of the technical, cost and scheduling issues.

This artist concept shows NASA’s Space Launch System, or SLS, rolling to a launch pad at Kennedy Space Center at night. SLS will be the most powerful rocket in history, and the flexible, evolvable design of this advanced, heavy-lift launch vehicle will meet a variety of crew and cargo mission needs. Credit: NASA/MSFC

The decision to move forward with the SLS comes after a wide ranging review of the technical risks, costs, schedules and timing known as Key Decision Point C (KDP-C), said Associate Administrator Robert Lightfoot, at the briefing. Lightfoot oversaw the review process.

“After rigorous review, we’re committing today to a funding level and readiness date that will keep us on track to sending humans to Mars in the 2030s – and we’re going to stand behind that commitment,” said Lightfoot. “Our nation is embarked on an ambitious space exploration program.”

“We are making excellent progress on SLS designed for missions beyond low Earth orbit,” Lightfoot said. “We owe it to the American taxpayers to get it right.”

He said that the development cost baseline for the 70-metric ton version of the SLS was $7.021 billion starting from February 2014 and continuing through the first launch set for no later than November 2018.

Lightfoot emphasized that NASA is also building an evolvable family of vehicles that will increase the lift to an unprecedented lift capability of 130 metric tons (143 tons), which will eventually enable the deep space human missions farther out than ever before into our solar system, leading one day to Mars.

“It’s also important to remember that we’re building a series of launch vehicles here, not just one,” Lightfoot said.

Blastoff of NASA’s Space Launch System (SLS) rocket and Orion crew vehicle from the Kennedy Space Center, Florida. Credit: NASA/MSFC

Lightfoot and Gerstenmaier both indicated that NASA hopes to launch sooner, perhaps by early 2018.

“We will keep the teams working toward a more ambitious readiness date, but will be ready no later than November 2018,” said Lightfoot.

The next step is conduct the same type of formal KDP-C reviews for the Orion crew vehicle and Ground Systems Development and Operations programs.

The first piece of SLS flight hardware already built and to be tested in flight is the stage adapter that will fly on the maiden launch of Orion this December atop a ULA Delta IV Heavy booster during the EFT-1 mission.

The initial 70-metric-ton (77-ton) version of the SLS stands 322 feet tall and provides 8.4 million pounds of thrust. That’s already 10 percent more thrust at launch than the Saturn V rocket that launched NASA’s Apollo moon landing missions, including Apollo 11, and it can carry more than three times the payload of the now retired space shuttle orbiters.

The core stage towers over 212 feet (64.6 meters) tall with a diameter of 27.6 feet (8.4 m) and stores cryogenic liquid hydrogen and liquid oxygen. Boeing is the prime contractor for the SLS core stage.

The first stage propulsion is powered by four RS-25 space shuttle main engines and a pair of enhanced five segment solid rocket boosters (SRBs) also derived from the shuttles four segment boosters.

The pressure vessels for the Orion crew capsule, including EM-1 and EFT-1, are also being manufactured at MAF. And all of the External Tanks for the space shuttles were also fabricated at MAF.

The airframe structure for the first Dream Chaser astronaut taxi to low Earth orbit is likewise under construction at MAF as part of NASA’s commercial crew program.

The first crewed flight of the SLS is set for the second launch on the EM-2 mission around the 2020/2021 time frame, which may visit a captured near Earth asteroid.

Stay tuned here for Ken’s continuing Earth and Planetary science and human spaceflight news.

Ken Kremer

August 27, 2014December 23, 2015 by Elizabeth Howell

Eye Problems From Space Affect At Least 21 NASA Astronauts: Study

Expedition 36/37 astronaut Karen Nyberg uses a fundoscope to take still and video images of her eye while in orbit. Credit: NASA

How does microgravity affect your health? One of the chief concerns of NASA astronauts these days is changes to eyesight. Some people come back from long-duration stays in space with what appears to be permanent changes, such as requiring glasses when previously they did not.

And the numbers are interesting. A few months after NASA told Universe Today that 20% of astronauts may face this problem, a new study points out that 21 U.S. astronauts that have flown on the International Space Station for long flights (which tend to be five to six months) face visual problems.

These include “hyperopic shift, scotoma and choroidal folds to cotton wool spots, optic nerve sheath distension, globe flattening and edema of the optic nerve,” states the University of Houston, which is collaborating with NASA on a long-term study of astronauts while they’re in orbit.

The International Space Station as seen by the departing STS-134 crew aboard space shuttle Endeavour in May 2011. Credit: NASA

NASA is flying an instrument on board the International Space Station that does optical coherence tomography, which acts like a microscope on the eye. The technology looks at things such as pressure in the eye and changes in the optic nerve and retinal structures.

The collaboration with the University of Houston recently won Heidelberg Engineering’s annual 2014 Xtreme Research Award. In the long term, the researchers involved are hoping to figure out what changes to make for long-duration missions. One example could be changing carbon dioxide levels on the station, if that is found to play a role.

Long-term health considerations will be one thing examined closely when an astronaut and a cosmonaut spend a year on the International Space Station in 2015, with their milestone bringing them in a small group of people who have spent a year or more consecutively in space.

Source: University of Houston