Elizabeth Howell is the senior writer at Universe Today. She also works for Space.com, Space Exploration Network, the NASA Lunar Science Institute, NASA Astrobiology Magazine and LiveScience, among others. Career highlights include watching three shuttle launches, and going on a two-week simulated Mars expedition in rural Utah. You can follow her on Twitter @howellspace or contact her at her website.
A 2014 image of NGC 2174 by the Hubble Space Telescope. Credit: NASA/ESA and the Hubble Heritage Team (STScI/AURA)
Billowing gas clouds and young stars feature in this February Hubble Space Telescope image, released as the telescope approaches its 24th birthday this coming April. The telescope has seen a lot of drama over the years, but in this case, thankfully the excitement is taking place 6,400 light-years away. Here you can see starbirth in action in the nebula NGC 2174, which is sometimes called the Monkey Head Nebula.
“This region is filled with young stars embedded within bright wisps of cosmic gas and dust. Dark dust clouds billow outwards, framed against a background of bright blue gas. These striking hues were formed by combining several Hubble images taken through different coloured filters, revealing a broad range of colours not normally visible to our eyes,” the European Space Agency wrote.
“These vivid clouds are actually a violent stellar nursery packed with the ingredients needed for building stars. The recipe for cooking up new stars is quite inefficient, and most of the ingredients are wasted as the cloud of gas and dust disperses. This process is accelerated by the presence of fiercely hot young stars, which triggers high-speed winds that help to blow the gas outwards.”
Hubble’s dramatic history includes a deformed mirror, a rescue mission, and a nearly last-minute decision to do a shuttle flight for repairs and upgrades when the shuttle program was wrapping up. You can read more about Hubble’s colorful history at the Space Telescope Science Institute.
The Challenger space shuttle a few moments after the rupture took place in the booster. Credit: NASA
What you see above is 32 minutes of something going wrong during each launch. While humanity has been launching things into space since the 1950s, you can see just how hard it is — over and over again. And when humans are riding aboard the rockets, the toll becomes more tragic.
According to the YouTube author of the video above, the vehicles shown include “V2, Vanguard TV3, Explorer S-1, Redstone 1, Titan I, Titan II, Titan IV, Atlas, Atlas-Centaur, N1, Delta, Delta III, Foton, Soyuz, Long March, Zenith, Space Shuttle Challenger, and more.”
Naturally, with each failure the engineers examine the systems and work to fix things for next time. A famous example is the Challenger shuttle explosion, which you can see about halfway through the video. There were multiple causes for the failure (human and technical), but one of them was an O-ring that failed in cold weather before the launch. NASA revised the launch rules and with contractors, made some changes to the booster rocket design, as a 2010 Air and Space Smithsonian article points out:
Freezing temperatures weakened an O-ring seal in a joint between two segments of the right booster. The weakness allowed hot gases to burn through the casing, causing the shuttle to break apart on ascent, which killed the seven-member crew. Two joints were redesigned with interlocking walls that had new bolts, pins, sensors, seals, and a third O-ring.
Still, launching is a risky business. That’s why it’s so important that engineers try to catch problems before they happen, and that as soon as a problem is seen, it’s fixed.
NASA's Robonaut 2 (left) flashes a Star Trek Vulcan salutation along with George Takei, a star of the original series, in 2012. "It was a keen demonstration of Robonaut 2’s manual dexterity. The gesture is difficult for many humans to make," Takei wrote on Facebook. Credit: NASA/James Blair
Legs — yes, legs — are on the manifest for the next SpaceX Dragon flight. The commercial spacecraft is expected to blast off March 16 with appendenges for Robonaut 2 on board, allowing the humanoid to move freely around station. After some initial tests in June will come R2’s first step, marking a new era in human spaceflight.
What’s exciting about R2 is not only its ability to take over simple tasks for the astronauts in station, but in the long run, to head “outside” to do spacewalks. This would greatly reduce risk to the astronauts, as extravehicular activity is one of the most dangerous things you can do outside (as a spacesuit leak recently reminded us.)
When installed, Robonaut will have a “fully extended leg span” of nine feet (wouldn’t we love to see the splits with that). Instead of a foot, each seven-jointed leg will have an “end effector” that is a sort of clamp that can grab on to things for a grip. It’s similar to the technology used on the Canadarm robotic arm, and also like Canadarm, there will be a vision system so that controllers know where to grasp.
NASA Expedition 35 astronaut Tom Marshburn (background) performs teleoperation activitites with Robonaut 2 aboard the International Space Station in 2013. Credit: NASA
The robot first arrived on station in February 2011 and (mostly while tied down) has done a roster of activities, such as shake hands with astronaut Dan Burbank in 2012 (a humanoid-human first in space), say hello to the world with sign language, and do functions such as turn knobs and flip switches. During Expedition 34/35 in 2012-13, astronaut Tom Marshburn even made Robonaut 2 catch a free-floating object through teleoperation.
Eventually NASA expects to use the robot outside the station, but more upgrades to Robonaut 2’s upper body will be needed first. The robot could then be used as a supplement to spacewalks, which are one of the most dangerous activities that humans do in space.
Closer to Earth, NASA says the technology has applications for items such as exoskeletons being developed to help people with physical disabilities.
NASA’s Robonaut 2 with “climbing legs” intended to let the robot rove around in the microgravity environment aboard the International Space Station. This version is being tested on the ground for eventual use in space. Credit: NASAR2A waving goodbye. Robonaut R2A waving goodbye as Robonaut R2B launches into space aboard STS-133 from the Kernnedy Space Center. R2 is the first humanoid robot in space. Credit: Joe Bibby
Hydrothermal vents deep in Earth's oceans. Could similar types of vents power the transport of silica and other materials out from Enceladus? Credit: NOAA
When it comes to life on Earth, we’re not sure if it came from the outside (transported by comets) or on the inside. A new theory focuses on the “interior ” theory, saying that microbes could have evolved from non-living matter such as chemical compounds in minerals and gases.
“Before biological life, one could say the early Earth had ‘geological life’. It may seem unusual to consider geology, involving inanimate rocks and minerals, as being alive. But what is life?” stated Terry Kee, a biochemist at the University of Leeds in the United Kingdom who participated in the research.
“Many people have failed to come up with a satisfactory answer to this question. So what we have done instead is to look at what life does, and all life forms use the same chemical processes that occur in a fuel cell to generate their energy.”
When thinking of a car, the research team says, they point out that fuel cells create electrical energy through the reaction of fuels and oxidants. This is called a “redox reaction”, which takes place when a molecule loses electrons and another molecule gains them.
In plants, photosynthesis creates electrical energy when carbon dioxide breaks down into sugars, and water is oxidized into molecular oxygen. (By contrast, humans oxidize sugars into carbon dioxide and break down the oxygen into water — another electrical energy process.)
Now, let’s go a step further. Hydrothermal vents are hot geysers on the sea floor that are often considered an interesting spot for life studies. They host “extremophiles”, or forms of life that exist (“thrive” is the better word) despite a harsh environment. The researchers say these vents are a sort of “environmental fuel cell” because electrical energy is generated from redox reactions between seawater oxidants and hydrothermal vents.
And this is where the new research comes in. At the University of Leeds and NASA’s Jet Propulsion Laboratory, the researchers put iron and nickel in the place of the usual “platinum catalysts” found in fuel cells and electrical experiments.
Rendering showing the location and size of water vapor plumes coming from Europa’s south pole.
While the power was reduced, electricity did indeed flow. And while researchers still don’t know how non-life could have transformed into life, they say this is another step to understanding what happened. What’s more, it could be useful for future trips to other planets.
“These experiments simulate the electrical energy produced in geological systems, so we can also use this to simulate other planetary environments with liquid water, like Jupiter’s moon Europa or early Mars,” stated Laura Barge, a researcher from the NASA Astrobiology Institute* who led the research.
“With these techniques we could actually test whether any given hydrothermal system could produce enough energy to start life, or even, provide energetic habitats where life might still exist and could be detected by future missions.”
Artist's conception of the Milky Way galaxy. Credit: Nick Risinger
Is it stretching it too far to think of a Lord of the Rings-esque “Entmoot” when reading the phrase “Council of Giants”? In this case, however, it’s not trees gathering in a circle, but galaxies.
A new map of the galactic neighborhood shows how the Milky Way may be restricted by a bunch of galaxies surrounding and constricting us with gravity.
“All bright galaxies within 20 million light years, including us, are organized in a ‘Local Sheet’ 34-million light years across and only 1.5 million light years thick,” stated Marshall McCall of York University in Canada, who is the sole author of a paper on the subject.
“The Milky Way and Andromeda are encircled by twelve large galaxies arranged in a ring about 24-million light years across. This ‘Council of Giants’ stands in gravitational judgment of the Local Group by restricting its range of influence.”
The “Council of Giants” is shown in this diagram based on 2014 research from York University. It shows the brightest galaxies within 20 million light-years of the Milky Way. The galaxies in yellow are the “Council.” (You can see a larger image if you click on this.) Credit: Marshall McCall / York University.
Here’s why McCall thinks this is the case. Most of the Local Sheet galaxies (the Milky Way, Andromeda, and 10 more of the 14 galaxies) are flattened spiral galaxies with stars still forming. The other other two galaxies are elliptical galaxies where star-forming ceased long ago, and of note, this pair lie on opposite sides of the “Council.”
“Winds expelled in the earliest phases of their development might have shepherded gas towards the Local Group, thereby helping to build the disks of the Milky Way and Andromeda,” the Royal Astronomical Society stated. The spin in this group of galaxies, it added, is unusually aligned, which could have occurred due to the influence of the Milky Way and Andromeda “when the universe was smaller.”
The larger implication is the Local Sheet and Council likely came to be in “a pre-existing sheet-like foundation composed primarily of dark matter”, or a mysterious substance that is not measurable by conventional instruments but detectable on how it influences other objects. McCall stated that on a small scale, this could help us understand more about how the universe is constructed.
Artist's impression of a satellite exploding. Credit: ESA
What happens to a battery in a dead satellite? Despite nearly 60 years of sending these machines into space, this is a “relative blind spot” among designers, the European Space Agency says. And that’s a big problem, because there’s a chance that these power sources can rupture and cause debris — adding to the growing problem in orbit.
With NASA estimating more than 500,000 dead satellites and other debris cluttering up the environment around Earth, the risk of something smashing into an important space thing — a spacecraft, a GPS satellite, a weather monitor — increases. So space policy-makers are doing what they can to reduce the problem (while also creating methods to clean it up.)
A few satellite breakups in the ’90s were linked to battery failures, but ESA notes these were older, non-lithium types. To figure out what’s happened more recently, the agency wants to learn more about battery behavior after the satellite shuts down, and how to prevent a breakup from happening.
“As a satellite drifts freely, could batteries endure the harsh environment of orbit – including wild temperature swings, degradation of thermal control and components as well as radiation exposure – without leakage or bursting?” ESA asks.
Artist’s impression of debris in low Earth orbit. Credit: ESA
For more information, go to the ESA tendering website and look for solicitation AO7840, called “Spacecraft Power System Passivation At End Of Mission.” The tender is valued between 200,000 and 500,000 Euros and closes April 23.
“The goal of the activity is to study and implement the most adequate means to achieve this power system passivation,” the tender states.
“This may involve the discharge and disconnection of the batteries and the disconnection of the solar arrays. This passivation needs to be reliable enough to avoid to deactivate the power system before the end of the mission. The proposed concept should be universal enough to be compatible with most space applications (but in priority European institutional market).”
No "Planet X" was found in a survey of the sky using NASA's Wide-Field Infrared Survey Explorer. This picture, which comes from the same dataset, shows a recently discovered star (in red) called WISEA J204027.30+695924.1. Credit: DSS/NASA/JPL-Caltech
It’s one of those rumors that just won’t quiet down — a large planet lurking at the solar system’s edge. Back in the 1840s, when Neptune was discovered, its orbit seemed to be a little “off” from what was expected.
Some astronomers of the time said that was caused by a planet further out. Although the Neptune perturbations are now ascribed to observational errors, the tale of Planet X continues, and has sometimes even been linked with doomsday. (See this past Universe Today story for the full tale.)
NASA’s latest survey puts even less credence in that theory. A scan of the sky showed nothing Saturn’s size or bigger at a distance of 10,000 Earth-sun distances, or astronomical units. Nothing bigger than Jupiter exists as far as 26,000 AU. (To put that in perspective, Pluto is 40 AU from the sun.)
“The outer solar system probably does not contain a large gas giant planet, or a small, companion star,” stated Kevin Luhman of the Center for Exoplanets and Habitable Worlds at Penn State University, author of a paper in the Astrophysical Journal describing the results.
Astronomers used information from NASA’s Wide-Field Infrared Survey Explorer, which did two full-sky scans in 2010 and 2011 to look at asteroids, stars and galaxies. NASA’s AllWISE program, released in November 2013, allows astronomers to find moving objects by comparing the two surveys.
Artist’s impression of the WISE satellite
A second study of the data found other objects further out in space — 3,525 stars and brown dwarfs (objects just below the threshold for fusion) within 500 light-years of the sun.
“We’re finding objects that were totally overlooked before,” stated Davy Kirkpatrick of NASA’s Infrared and Processing Analysis Center at the California Institute of Technology, who led the second paper.
Both papers will be published in the Astrophysical Journal.
The space between the galaxies is expanding. How big is it? Credit: NASA/HST
Did some of the oldest galaxies grow up quickly? That’s an intriguing possibility raised by a research team that found “mature” galaxies some 12 billion light years away, when the universe was less than 2 billion years old.
“Today the universe is old and filled with galaxies that have largely stopped forming stars, a sign of galactic maturity,” stated Caroline Straatman from the Netherlands’ Leiden University, a graduate student who led the research. “However, in the distant past, galaxies were still actively growing by consuming gas and turning it into stars. This means that mature galaxies are expected to be almost non-existent when the universe was still young.”
Using data from the Magellan Baade Telescope’s FourStar Galaxy Evolution Survey and combining with other observatories, researchers looked at the young universe using near infrared wavelengths and found 15 galaxies at an average of 12 billion light-years away. While the galaxies are faint using visual wavelengths, they were easy to spot in infrared — and hosted as many as 100 billion stars per galaxy, on average.
The Milky Way over the ESO 3.6-metre Telescope, a photo submitted via Your ESO Pictures Flickr Group. Credit: ESO/A. Santerne
These galaxies each have a similar mass to the Milky Way, but stopped making stars when the universe was “only 12 percent of its current age”, researchers said. This implies that star-forming happened much more quickly in the past than right now, since the rate is estimated at several hundred times higher than what is observed in the Milky Way now.
It’s not clear what caused the rapid aging, but you can be sure researchers will look into this further. You can read the research in Astrophysical Journal Letters or in preprint version on Arxiv. Other databases used include Hubble’s Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey and the Great Observatories Origins Deep Survey.
Astronauts participate in survival training in early 2014 in the wilderness near Star City, Russia. Credit: European Space Agency (YouTube)
If your spaceship comes back in rural Kazakhstan, and it’s blowing snow, and rescue forces can’t get there right away, how would you survive the cold? This winter survival video below shows how cosmonauts and astronauts would leave the spacecraft and make shelter while waiting for help to arrive.
An even more complicated scenario would arise if the crew member was injured, explain European Space Agency astronauts Andreas Mogensen and Thomas Pesquet, who were reflecting on Mogensen’s survival training in January in the video.
The video shows crew members creating a makeshift brace for a broken arm, which would be painful — but would not necessarily inhibit walking. If it was a broken leg, other crew members would need to carry the injured person — slowing down the march if they needed to move to another location.
Opportunity rover’s 1st mountain climbing goal is dead ahead in this up close view of Solander Point at Endeavour Crater. Opportunity has ascended the mountain looking for clues indicative of a Martian habitable environment. This navcam panoramic mosaic was assembled from raw images taken on Sol 3385 (Aug 2, 2013). Credit: NASA/JPL/Cornell/Marco Di Lorenzo/Ken Kremer (kenkremer.com)
NASA’s preliminary (read: not finalized) budget for 2015 would eliminate funding for the long-running Opportunity rover mission that’s discovered extensive evidence of past water on Mars in the past decade.
While the agency’s baseline budget request shows no funding for the long-running Mars mission past 2015, NASA added that Opportunity is among several missions that could receive extension money if extra funds become available. Also, the budget needs to be approved by Congress before anything is set in stone.
Here’s where Opportunity could get funding, under the current structure: The White House has proposed a $56 billion “Opportunity, Growth and Security Initiative” across the U.S. government that would surpass the budgetary spending limit that Congress set in December. (Some news reports indicate the Republicans are not on board with this, but it’s early yet.)
NASA’s Opportunity rover was imaged here from Mars orbit by MRO HiRISE camera on Feb. 14, 2014. This mosaic shows Opportunity’s view today while looking back to vast Endeavour crater from atop Murray Ridge by summit of Solander Point. Opportunity captured this photomosaic view on Feb. 16, 2014 (Sol 3579) from the western rim of Endeavour Crater where she is investigating outcrops of potential clay minerals formed in liquid water. Assembled from Sol 3579 colorized navcam raw images. Credit: NASA/JPL/Cornell/Marco Di Lorenzo/Ken Kremer-kenkremer.com
Within NASA, that translates into an extra $885.5 million that would be used for certain priority areas in science, aeronautics, space technology, exploration, space operations, education and other items. If the funding goes through and if it is approved in full, Opportunity could receive money within $35 million allocated in planetary science extended mission funding for 2015.
NASA, meanwhile, is undertaking a regular review of several Mars programs (among others) to see which ones give the best return for funding. “The missions to be reviewed include MSL [Mars Science Laboratory/Curiosity], MRO [Mars Reconnaissance Orbiter], Opportunity, Odyssey and Mars Express,” NASA stated. But as the table below shows, right now Opportunity has no funding in fiscal 2015, while the other missions do. (Note that funding would cease for Odyssey in 2017 under this plan.)
NASA’s budget request for fiscal 2015 eliminates funding for the Mars Exploration Rover Opportunity in 2015. Click for a larger version. Credit: National Aeronautics and Space Administration FY 2015 President’s Budget Request Summary
Here’s what NASA’s budget request says about the extended funding:
“Planetary Science Extended Mission Funding: Provide an additional $35.0 million to increase support for extended missions prioritized in the upcoming 2014 Senior Review. The Budget provides funding for high priority extended missions such as Cassini and Curiosity. However, it does not provide funding to continue all missions that are likely to be highly rated in Senior Review. The funding augmentation would allow robust funding for all extended missions that are highly ranked by the 2014 Senior Review, enabling high science return at relatively low cost, instead of potentially terminating up to two missions or reducing science across many or all of them.”
On Twitter, the Planetary Society’s Casey Dreier, its director of advocacy, wrote a few tweets about the budget last night, including one addressing Opportunity. “As expected, MER Opportunity has no funding as of Oct 1st, unless supplemental funding is added,” he said, adding that a bright spot is that the Curiosity mission has funding through fiscal 2019 (which is as far as the numbers go in the budget request.)
Opportunity by Solander Point peak – 2nd Mars Decade Starts here! NASA’s Opportunity rover captured this panoramic mosaic on Dec. 10, 2013 (Sol 3512) near the summit of “Solander Point” on the western rim of Endeavour Crater where she starts Decade 2 on the Red Planet. She is currently investigating outcrops of potential clay minerals formed in liquid water on her 1st mountain climbing adventure. Assembled from Sol 3512 navcam raw images. Credit: NASA/JPL/Cornell/Marco Di Lorenzo/Ken Kremer-kenkremer.com
Opportunity landed on Mars in January 2004 and has rolled more than 24 miles (38 kilometers) in the years since, long outliving its twin Spirit (who ceased communications in 2010). Universe Today’s Ken Kremer recently covered the contributions these rovers made to science in the past 10 years.
On an unrelated note, NASA announced today (March 11) that the Mars Reconnaissance Orbiter went into safe mode “after an unscheduled swap from one main computer to another”, but the spacecraft is expected to be working normally in a few days. (MRO has been through several safe mode incidents over the years, including several times in 2009.)
