Virtual Star Party – Oct. 7, 2012: West Coast Edition

Only the West Coast of North America was represented in our Virtual Star Party this week. We had astronomers in Oregon, California and Nevada. But we also a great night, with dozens of observed objects, including Comet 168P/Hergenrother.

Click here to see all the pictures from last night’s observing session.

Astronomers: Gary Gonella, Roy Salisbury, Bill McLaughlin, and Stuart Forman.

Bringing the Science: Dr. Thad Szabo and Scott Lewis

Host: Fraser Cain

We hold our Virtual Star Party every Sunday night when it gets dark on the West Coast, and broadcast live on Google+. Circle the Virtual Star Party page on G+ to get a notification of the event.

Voyager 1 May Have Left the Solar System

Number of particles from the Sun hitting Voyager 1. Credit: NASA

While there’s no official word from NASA on this, the buzz around the blogosphere is that Voyager 1 has left the Solar System. The evidence comes from this graph, above, which shows the number of particles, mainly protons, from the Sun hitting Voyager 1 across time. A huge drop at the end of August hints that Voyager 1 may now be in interstellar space. The last we heard from the Voyager team was early August, and they indicated that on July 28, the level of lower-energy particles originating from inside our Solar System dropped by half. However, in three days, the levels had recovered to near their previous levels. But then the bottom dropped out at the end of August.

The Voyager team has said they have been seeing two of three key signs of changes expected to occur at the boundary of interstellar space. In addition to the drop in particles from the Sun, they’ve also seen a jump in the level of high-energy cosmic rays originating from outside our Solar System.

The third key sign would be the direction of the magnetic field. No word on that yet, but scientists are eagerly analyzing the data to see whether that has, indeed, changed direction. Scientists expect that all three of these signs will have changed when Voyager 1 has crossed into interstellar space.

“These are thrilling times for the Voyager team as we try to understand the quickening pace of changes as Voyager 1 approaches the edge of interstellar space,” said Edward Stone, the Voyager project scientist for the entire mission, who was quoted in early August. “We are certainly in a new region at the edge of the solar system where things are changing rapidly. But we are not yet able to say that Voyager 1 has entered interstellar space.”

Stone added that the data are changing in ways that the team didn’t expect, “but Voyager has always surprised us with new discoveries.”

Voyager 1 launched on Sept. 5, 1977, is approximately 18 billion kilometers (11 billion miles) from the Sun. Voyager 2, which launched on Aug. 20, 1977, is close behind, at 15 billion km (9.3 billion miles) from the Sun.

Sources: NASA, Eric Berger/ Houston Chronicle, Scientific American

Scooping Mars – Shaken Not Stirred ! – Color Video

Image Caption: Scooping Mars at ‘Rocknest’ mosaic shows a before and after view of the spot where Curiosity dug up her 1st Martian soil sample on Sol 61 (Oct 7. 2012). Navcam camera mosaic at left shows the arm at work during scooping operations. Image at right shows the tiny scooped trench measuring about 1.8 inches (4.5 centimeters) wide. See NASA JPL scooped sample vibration video below. Credit: NASA/JPL-Caltech/Ken Kremer/Marco Di Lorenzo

“Here’s the scoop: I like my regolith shaken!” tweeted NASA’s Curiosity Mars rover a short while ago in a nod to the 50th anniversary of the premiere of the 1st James Bond action flick.

And the “proof” is in the video as they say. See below a short NASA video clip showing the 1st Martian material collected using the small table spoon sized scoop on Curiosity’s robotic arm and subsequently being vibrated inside the scoop after it was lifted from the ground of Gale Crater this past weekend on Sol 61, Oct. 7, 2012.

Scooping Mars at ‘Rocknest’ mosaic above shows a before and after view of the spot where Curiosity was working at on Sol 61.

“So excited to dig in! One scoop of regolith ripple, coming right up!” she tweeted in the midst of the action.


Video Caption: This 256 frame video clip of Mastcam images shows the 1st sample of Martian material being vibrated inside Curiosity’s table spoon sized scoop on Oct. 7, 2012. Credit: NASA/JPL-Caltech/MSSS

Yeah baby ! Just as the rover’s science and engineers announced last week, the 6 wheeled mega robot Curiosity scored a major success by scooping up her very first sample of windblown Martian sand from the ‘Rocknest’ ripple she arrived at just last week.

The plan ahead is to use the collected “Red Planet” material to cleanse the interior of the rover’s sample-handling system of a residual layer of oily contamination of “Home Planet” material that could interfere with unambiguously interpreting the results.

For sure the science team doesn’t want any false positives with respect to any potential detection of the long sought organic compounds that could shed light on whether a habitant supporting Martian microbes ever existed in the past or present.

The newly collected material will be vibrated at 8 G’s and then be fed into Curiosity’s Collection and Handling for In-Situ Martian Rock Analysis (CHIMRA) device on the robotic arm turret.

Curiosity’s motorized scoop measures 1.8 inches (4.5 centimeters) wide, 2.8 inches (7 centimeters) long. The images reveal the scoop left behind a small hole about 1.8 inches (4.5 centimeters) wide.

Image Caption: Sol 61 Navcam raw image shows the hole dug up by Curioisty’s scoop on Oct. 7, 2012 Credit: NASA/JPL-Caltech

Image Caption: Mastcam 100 telephoto close up image of Rocknest trench on Sol 61. Credit: NASA/JPL-Caltech/MSSS

At last week’s Oct. 4 media briefing, the rover team said they would make three deliveries of scooped soil to cleanse out the sample acquisition system over the next two week or so before pouring sieved Mars material into the SAM and Chemin analytical chemistry labs on the rover’s deck for detailed evaluation of the elemental and mineralogical composition.

Ken Kremer

Baumgartner in Final Preparations for Supersonic Freefall Attempt on October 9

Skydiver, pilot and BASEjumper Felix Baumgartner will attempt to break the sound barrier in freefall on Tuesday, October 9, 2012, jumping from a capsule lifted by a giant balloon to 36,576 meters (120,000 feet). This is something that Baumgartner has been preparing for over the past five years, but his team says the time period he now finds himself — the last few hours before takeoff — might be the most challenging of all.

“I’ll probably feel the most anxious when I’m trying to sleep in the hours before I start getting ready –when everything’s quiet and it’s just me and my thoughts,” 43-year old Baumgartner admitted. “Once my day begins, I’ll have a lot to do and my mind will have something to focus on.”

The target time for the launch of the balloon and capsule is 12:00 GMT/ 8 am EDT/5 am PDT on October 9. To watch it live, tune into http://youtube.com/redbull or http://redbullstratos.com/

Here’s how Baumgarter is spending the final 24 hours before the jump from the edge of space:

Launch Minus 24 Hours: Baumgartner started the day with a light cardio-based workout, mostly to “relax and loosen up,” according to Red Bull High Performance Director Andy Walshe.

Pilot Felix Baumgartner and girlfriend Nicole Oetl pose for a photograph during the preparations for the flight of the Red Bull Stratos mission in Roswell, New Mexico. Credit: Red Bull Stratos.

Minus 18h30: Rest and relaxation. His family has arrived at the New Mexico launch site and he will spend time with them, as well as reading messages of support that have been pouring in from around the world and drawing in his sketchbook – a pastime that he says helps to clear his mind. In the back of his mind he is always reviewing his checklists for the mission, his team says.

Minus 13h30: Baumgartner will join members of the crew for a light early dinner, but the food on his plate will be unique. For at least 24 hours before his jump, he must stick to a low-fiber diet prescribed by the mission’s medical team. It is vital for him to eat only foods that will clear his system quickly, without leaving residue that could create gas: a condition that can cause problems in the low-pressure of the stratosphere because it can expand in the body and cause serious discomfort.

Minus 12h00: Baumgartner will attempt to get to sleep early – before the Sun has even set. But whether he sleeps or tosses and turns all night — like Charles Lindbergh did before his historic flight across the Atlantic in 1920 – only Baumgarter knows.

Minus 4h30: “When I need to be ready, I’m always ready,” Baumgartner often says. And while he will try to sleep as long as possible, he’ll need to rise four to five hours before dawn to be ready for the intense day ahead.

Minus 3h30: Baumgartner will arrive at the launch site, accompanied by his team, which includes Col. Joe Kittinger, whose freefall record Baumgarter is trying to break. Kittinger, a retired Air Force officer, jumped from 31,500 meters (31.5 km, 19.5 miles, 102,000 ft) in 1960. Now 83, Kittinger has been assisting Baumgartner in preparations for the jump.

Minus 4h00: Baumgartner will head to the runway where, as is habitual for the experienced pilot before
every flight, he will conduct a meticulous inspection of the capsule.

Minus 2h30: Baumgartner will undergo a final medical check and a compact, state-of-the-art physiological monitoring system will be strapped to his chest to be worn under his pressure suit throughout the mission.

Minus 2h00: Life Support Engineer Mike Todd will dress Baumgartner in his suit, a painstaking process, and Baumgartnerwill ‘pre-breathe’ oxygen for two hours to eliminate nitrogen from his bloodstream, which could expand dangerously at altitude.

Minus 0h30: Baumgartner will be strapped into his capsule chair to conduct final instrument checks as
directed by Mission Control. Then Capsule Engineer Jon Wells will seal the clear acrylic door. For several more long minutes of anticipation, Baumgartner will await countdown and, finally, launch.

Here’s a video that shows what the ascent and jump might be like:

Source: Red Bull Stratos

Falcon 9 Experienced Engine Anomaly But Kept Going to Orbit

During last night’s launch of the Dragon capsule by SpaceX’s Falcon 9 rocket, there was an anomaly on one of the rocket’s nine engines and it was shut down. But Dragon still made it to orbit – just a little bit later than originally expected. At about 1:20 into the flight, there was a bright flash and a shower of debris. SpaceX’s CEO Elon Musk issued a statement about the anomaly saying:

“Falcon 9 detected an anomaly on one of the nine engines and shut it down. As designed, the flight computer then recomputed a new ascent profile in realtime to reach the target orbit, which is why the burn times were a bit longer. Like Saturn V, which experienced engine loss on two flights, the Falcon 9 is designed to handle an engine flameout and still complete its mission. I believe F9 is the only rocket flying today that, like a modern airliner, is capable of completing a flight successfully even after losing an engine. There was no effect on Dragon or the Space Station resupply mission.”

UPDATE (2 pm EDT 8/10): SpaceX has now provided an update and more information: the engine didn’t explode, but (now updated from a previous update), “panels designed to relieve pressure within the engine bay were ejected to protect the stage and other engines.” Here’s their statement:

Approximately one minute and 19 seconds into last night’s launch, the Falcon 9 rocket detected an anomaly on one first stage engine. Initial data suggests that one of the rocket’s nine Merlin engines, Engine 1, lost pressure suddenly and an engine shutdown command was issued. We know the engine did not explode, because we continued to receive data from it. Panels designed to relieve pressure within the engine bay were ejected to protect the stage and other engines. Our review of flight data indicates that neither the rocket stage nor any of the other eight engines were negatively affected by this event.

As designed, the flight computer then recomputed a new ascent profile in real time to ensure Dragon’s entry into orbit for subsequent rendezvous and berthing with the ISS. This was achieved, and there was no effect on Dragon or the cargo resupply mission.

Falcon 9 did exactly what it was designed to do. Like the Saturn V (which experienced engine loss on two flights) and modern airliners, Falcon 9 is designed to handle an engine out situation and still complete its mission. No other rocket currently flying has this ability.

It is worth noting that Falcon 9 shuts down two of its engines to limit acceleration to 5 g’s even on a fully nominal flight. The rocket could therefore have lost another engine and still completed its mission.

We will continue to review all flight data in order to understand the cause of the anomaly, and will devote the resources necessary to identify the problem and apply those lessons to future flights. We will provide additional information as it becomes available.

In their initial press release following the launch SpaceX had originally described the performance of Falcon 9 as nominal “during every phase of its approach to orbit.”

During the press briefing following the launch SpaceX President Gwynne Shotwell replied to a question about the flash and said “I do know we had an anomaly on Engine 1, but I have no data on it. But Falcon 9 was designed to lose engines and still make mission, so it did what it was supposed to do. If you do end up with issues, you burn longer to end up where you need to go.”

SpaceX’s website also mentions this capability, saying, “”This vehicle will be capable of sustaining an engine failure at any point in flight and still successfully completing its mission. This actually results in an even higher level of reliability than a single engine stage.”

Dragon made it to orbit about 30 seconds later than originally planned, but Shotwell said it made it into the correct orbit, “within two or three kilometers in both apogee and perigee and Dragon is now on its way to Station.” The anomaly happened right at the time of Max-Q, just as the vehicle went supersonic.

The Space Shuttle was also designed to make it into orbit even if one of its three engines failed – after a certain point in the flight – and did so at least once to this reporter’s knowledge, on STS-51-F which resulted in an Abort To Orbit trajectory, where the shuttle achieved a lower-than-planned orbital altitude.

This was the first time SpaceX made lift-off at their originally planned “T-0” launch time, Shotwell noted. And they also deployed a tag-along, secondary payload in addition to the Dragon capsule, a prototype commercial communications satellite for New Jersey-based Orbcomm Inc. However, A report by Jonathan McDowell indicates the Orbcomm satellite is being tracked in low orbit instead of its elliptical target orbit because the Falcon 9 upper stage failed its second burn. (More info here from Jonathan’s Space Report).

SpaceX will undoubtedly review the anomaly, and we’ll provide more information about it when available.

SpaceX Launches to the International Space Station. Credit: NASA

Liftoff! SpaceX Launches First Official Commercial Resupply Mission to ISS

The launch of SpaceX’s Falcon 9 rocket sending the Dragon capsule to orbit. Credit: KSC Twitter Feed

SpaceX has successfully launched the first official Cargo Resupply Services (CRS) mission to the International Space Station. The commercial company’s Falcon 9 rumbled rocket to life at 8:35 EDT on Oct 7 (00:35 UTC Oct. 8) in a picture perfect launch, sending the Dragon capsule on its way in the first of a dozen operational missions to deliver supplies to the orbiting laboratory. The launch took place at Launch Complex 40 at Cape Canaveral Air Force Station in Florida, just a few miles south of the space shuttle launch pads.

“This was a critical event for NASA and the nation tonight,” said NASA Administrator Charlie Bolden after the launch. “We are once again launching spacecraft from American soil with supplies that the ISS astronauts need.”

Watch the launch video below:

All the major milestones of the launch ticked off in perfect timing and execution, and the Dragon capsule is now in orbit with its solar arrays deployed. The Dragon capsule separated from the Falcon 9 about 10 minutes and 24 seconds after liftoff. Dragon should arrive at the ISS on Oct. 10 and the crew will begin berthing operations after everything checks out.

All three members of the current ISS crew were able to watch the launch live via a NASA uplink to the ISS, and Commander Suni Williams passed on her congratulations to the SpaceX team, saying “We are ready to grab Dragon!”

Williams and astronaut Akihiko Hoshide will use the CanadArm 2 to grapple the Dragon capsule around 7:22 a.m. EDT (11:22 UTC) Wednesday, moving it to a berthing at the Earth-facing port of the forward Harmony module.

Even though SpaceX sent the Dragon to the ISS in May, that was considered a demonstration flight and this flight is considered the first operational mission.

“No question, we are very excited,” said SpaceX President Gwynne Shotwell just before the launch. “Everyone was very excited in May and we are very much looking forward to moving forward with the operational missions.”

Dragon is carrying approximately 450 kg (1,000 pounds) of supplies, including food, water, scientific experiments and Space Station parts. There are also 23 student experiments from the Student Spaceflight Experiments Program (SSEP) involving 7,420 pre-college students engaged in formal microgravity experiment design, according to SSEP director Dr. Jeff Goldstein.

SpaceX and NASA revealed this weekend a special treat is on board a new freezer called GLACIER (General Laboratory Active Cryogenic ISS Experiment Refrigerator): Blue Bell ice cream, a brand that is a favorite of astronauts training at the Johnson Space Center in Houston. The freezer will be used to return frozen science experiments to Earth.

In the next three days, Dragon will perform systems checks, and start a series of Draco thruster firings to reach the International Space Station.

Dragon will return a total of 750 kg (1,673 pounds) of supplies and hardware to the ground. NASA says Dragon’s capability to return cargo from the station “is critical for supporting scientific research in the orbiting laboratory’s unique microgravity environment, which enables important benefits for humanity and vastly increases understanding of how humans can safely work, live and thrive in space for long periods. The ability to return frozen samples is a first for this flight and will be tremendously beneficial to the station’s research community. Not since the space shuttle have NASA and its international partners been able to return considerable amounts of research and samples for analysis.”

Dragon is currently scheduled to return to Earth at the end of the month, splashing down in the Pacific Ocean on October 29.

1000 SpaceX employees watch Falcon 9 and Dragon launch, at the Hawthorne, California headquarter. Credit: SpaceX

Taking a cue from the Mars Science Laboratory “Mohawk Guy” this SpaceX employee watching from Hawthorne sports a blue mohawk with a SpaceX logo shaved on her head. Credit: SpaceX.

Here’s a shorter video version of the launch from SpaceX:

Minute Physics: Real World Telekinesis

How do magnets affect things at a distance? How does the Sun heat our planet from 93 million miles away? How can we send messages across the world with our cell phones? We take these seemingly simple things for granted, but in fact there was a time not too long ago when the processes behind them were poorly understood, if at all… and, to the uninformed, there could seem to be a certain sense of “magic” about them.

This video from MinutePhysics, featuring director of the Perimeter Institute for Theoretical Physics Neil Turok, illustrates how our understanding of electromagnetic fields was developed and why there’s nothing magic about it… except, perhaps, how they pack all that excellent info into 5 minutes. Enjoy!

Video: MinutePhysics (Created by Henry Reich.) In conjunction with The CBC Massey Lectures.

Surreal Photos: CubeSats Launched from the Space Station

Three small CubeSats are deployed from the International Space Station on October 4, 2012. Credit: NASA

Five tiny CubeSats were deployed from the International Space Station on Thursday and astronaut Chris Hadfield called the image above “surreal” on Twitter. And rightly so, as they look like a cross between Star Wars training droids and mini Borg Cubes from Star Trek. The Cubesats measure about 10 centimeters (4 inches) on a side and each will conduct a range of scientific missions, ranging from Earth observation and photography to technology demonstrations to sending LED pulses in Morse Code (which should be visible from Earth) to test out a potential type of optical communication system.

These are low-cost satellites that could be the wave of the future to enable students and smaller companies to send equipment into space. If you’re worried about these tiny sats creating more space junk, Hadfield assured that since they are very light and in such a low orbit, the Cubesat orbits will decay within a few months.

The Rubic-cube-sized Cubesats were deployed from the new Japanese Small Satellite Orbital Deployer that was brought to the space station in July by the Japanese HTV cargo carrier.

The Japanese FITSAT-1 will investigate the potential for new kinds of optical communication by transmitting text information to the ground via pulses of light set to Morse code. The message was originally intended to be seen just in Japan, but people around the world have asked for the satellite to communicate when it overflies them, said Takushi Tanaka, professor at The Fukuoka Institute of Technology.

Observers, ideally with binoculars, will be able to see flashes of light — green in the northern hemisphere, where people will see the “front” of the satellite, and red in the southern hemisphere, where the “back” will be visible.

The message it will send is “Hi this is Niwaka Japan.” Niwaka is the satellite’s nickname and reflects a play on words in the local dialect of southwestern Japan, according to an article on Discovery Space. To see the Morse Code message, the Cubesat will be near the ISS, so find out when you can see the ISS from NASA or Heaven’s Above. Find out more about the FITSAT at this website.

The other Cubesats include NASA’s TechEdSat which carries a ham radio transmitter and was developed by a group of student interns from San Jose State University (SJSU) in California with mentoring and support from staff at NASA’s Ames Research Center.

“TechEdSat will evaluate plug-and-play technologies, like avionics designed by commercial providers, and will allow a group of very talented aerospace engineering students from San Jose State University to experience a spaceflight project from formulation through decommission of a small spacecraft,” said Ames Director S. Pete Worden.

The other Cubesats include RAIKO, which will do photography from space, We Wish, an infrared camera for environmental studies, and and the F-1 Vietnam Student CubeSat which has an on-board camera for Earth observation.

See more cool-looking images and video of the deployement below (all images credit the Expedition 32 crew from the ISS/NASA):

How to Steal a Space Shuttle

For two days, from October 12 to 13, the shuttle Endeavour will be transported along 12 miles of road on the final leg of its journey to the California Science Center. During that time the orbiter will be the most publicly exposed as it’s ever been, a national treasure on the streets of LA. While this will of course be a well-orchestrated undertaking with the security of not only Endeavour but citizens and spectators being of utmost priority, one might be prompted to speculate: what if someone tried to steal the space shuttle?

And that one, in this instance, was Jalopnik.com‘s Jason Torchinsky. In his latest article, Jason describes in detail a method for snatching a spaceship — and a rather dramatic one at that, worthy of a Bondian supervillian (and requiring a similarly cinematic amount of funds.) However nefarious, fictitious, and unlikely, it’s nevertheless intriguing.

Now while we don’t encourage the theft of a space shuttle (or any federal property, for that matter) it’s a fun read… check it out.

Just keep an eye out for any suspicious Swiss skulking along Endeavour’s route…

(Image: NASA/Bill Ingalls)

Curiosity Set for 1st Martian Scooping at ‘Rocknest’ Ripple

Image caption: Context view of Curiosity working at ‘Rocknest’ Ripple. Curiosity’s maneuvers robotic arm for close- up examination of ‘Rocknest’ ripple site and inspects sandy material at “bootlike” wheel scuff mark with the APXS (Alpha Particle X-Ray Spectrometer) and MAHLI (Mars Hand Lens Imager) instruments positioned on the rotatable turret at the arm’s terminus. Mosaic was stitched together from Sol 57 & 58 Navcam raw images and shows the arm extended to fine grained sand ripple in context with the surrounding terrain and eroded rim of Gale Crater rim on the horizon. Rocknest patch measures about 8 feet by 16 feet (2.5 meters by 5 meters).See NASA JPL test scooping video below. Credit: NASA/JPL-Caltech/Ken Kremer/Marco Di Lorenzo

NASA’s Curiosity rover is set to scoop up her 1st sample of Martian soil this weekend at a soil patch nicknamed ‘Rocknest’ -see our context mosaic above – and will funtion as a sort of circulatory system cleanser for all the critical samples to follow. This marks a major milestone on the path to delivering Mars material to the sample acquisition and processing system for high powered analysis by the robots chemistry labs and looking for the ingredients of life, said the science and engineering team leading the mission at a media briefing on Thursday, Oct 4.

Since landing on the Red Planet two months ago on Aug. 5/6, Curiosity has trekked over 500 yards eastwards across Gale crater towards an intriguing area named “Glenelg” where three different types of geologic terrain intersect.

This week on Oct. 2 (Sol 56), the rover finally found a wind driven patch of dunes at ‘Rocknest’ with exactly the type of fine grained sand that the team was looking for and that’s best suited as the first soil to scoop and injest into the sample acquisition system.

See NASA JPL earthly test scooping video below to visualize how it works:

“We now have reached an important phase that will get the first solid samples into the analytical instruments in about two weeks,” said Mission Manager Michael Watkins of NASA’s Jet Propulsion Laboratory in Pasadena, Calif.

The rover used its wheels to purposely scuff the sand and expose fresh soil – and it sure looked like the first human “bootprint” left on the Moon by Apollo 11 astronauts Neil Armstrong and Buzz Aldrin.

Curiosity will remain at the “Rocknest” location for the next two to three weeks as the team fully tests and cleans the walls of most of the sample collection, handling and analysis hardware – except for the drilling equipment – specifically to remove residual contaminants from Earth.

Image caption: ‘Rocknest’ From Sol 52 Location on Sept. 28, 2012, four sols before the rover arrived at Rocknest. The Rocknest patch is about 8 feet by 16 feet (1.5 meters by 5 meters). Credit: NASA/JPL-Caltech/MSSS

The purpose of this initial scoop is to use the sandy material to thoroughly clean out, rinse and scrub all the plumbing pipes, chambers, labyrinths and interfaces housed inside the complex CHIMRA sampling system and the SAM and CheMin chemistry labs of an accumulation of a very thin and fine oily layer that could cause spurious, interfering readings when the truly important samples of Martian soil and rocks are collected for analysis starting in the near future.

The scientists especially do not want any false signals of organic compounds or other inorganic materials and minerals stemming from Earthly contamination while the rover and its instruments were assembled together and processed for launch.

“Even though we make this hardware super squeaky clean when it’s delivered and assembled at the Jet Propulsion Laboratory, by virtue of its just being on Earth you get a kind of residual oily film that is impossible to avoid,” said Daniel Limonadi of JPL, lead systems engineer for Curiosity’s surface sampling and science system. “And the Sample Analysis at Mars instrument is so sensitive we really have to scrub away this layer of oils that accumulates on Earth.”

The team plans to conduct three scoop and rinse trials – dubbed rinse and discard – of the sample acquisition systems. So it won’t be until the 3rd and 4th soil scooping at Rocknest that a Martian sample would actually be delivered for entry into the SAM and CheMin analytical chemistry instruments located on the rover deck.

“What we’re doing at the site is we take the sand sample, this fine-grained material and we effectively use it to rinse our mouth three times and then kind of spit out,” Limonadi said. “We will take a scoop, we will vibrate that sand on all the different surfaces inside CHIMRA to effectively sand-blast those surfaces, then we dump that material out and we rinse and repeat three times to finish cleaning everything out. Our Earth-based testing has found that to be super effective at cleaning.”

Limondi said the first scooping is likely to be run this Saturday (Oct 6) on Sol 61, if things proceed as planned. Scoop samples will be vibrated at 8 G’s to break them down to a very fine particle size that can be easily passed through a 150 micron sieve before entering the analytical instruments.

The team is being cautious, allowing plenty of margin time and will not proceed forward with undue haste.

“We’re being deliberately slow and incredibly careful,” said Watkins. “We’re taking a lot of extra steps here to make sure we understand exactly what’s going on, that we won’t have to do every time we do a scoop in the future.”

Curiosity’s motorized, clamshell-shaped scoop measures 1.8 inches (4.5 centimeters) wide, 2.8 inches (7 centimeters) long, and can sample to a depth of about 1.4 inches (3.5 centimeters). It is part of the CHIMRA collection and handling device located on the tool turret at the end of the rover’s arm.

“The scoop is about the size of an oversized table spoon,” said Limonadi.

Image caption: Curiosity extends 7 foot long arm to investigate ‘Bathurst Inlet’ rock outcrop with the MAHLI camera and APXS chemical element spectrometer in this mosaic of Navcam images assembled from Sols 53 & 54 (Sept. 29 & 30, 2012). Mount Sharp, the rover’s eventual destination is visible on the horizon. Thereafter the rover drove more than 77 feet (23 meters) eastwards to reach the ‘Rocknest’ sand ripple. Credit: NASA/JPL-Caltech/Ken Kremer/Marco Di Lorenzo

During the lengthy stay at Rocknest, the rover will conduct extensive investigations of the surrounding rocks and terrain with the cameras, ChemCam laser, DAN, RAD as well as weather monitoring with the REMS instrument.

After finishing her work at Rocknest, Curiosity will resume driving eastward to Glenelg, some 100 meters (yards) away where the team will select the first targets and rock outcrops to drill, sample and analyze.

At Glenelg and elsewhere, researchers hope to find more evidence for the ancient Martian stream bed they discovered at rock outcrops at three different locations that Curiosity has already visited.

Curiosity is searching for organic molecules and evidence of potential habitable environments to determine whether Mars could have supported Martian microbial life forms, past or present.

Ken Kremer

Image caption: Curiosity’s Travels Through Sol 56 – Oct. 2, 2012