MetaFilter posts tagged with science and NASA

Saturn Equinox

netbros — Mon, 21 Sep 2009 16:17:16 -0800

Cassini Reveals New Ring Quirks, Shadows During Saturn Equinox. "It's like putting on 3-D glasses and seeing the third dimension for the first time," said Bob Pappalardo, Cassini project scientist at NASA's Jet Propulsion Laboratory in Pasadena, Calif. "This is among the most important events Cassini has shown us." Latest press images.

Happy 40th anniversary, mankind.

sexyrobot — Thu, 02 Jul 2009 13:01:13 -0800

Moon Landing Tapes Found! All the videos you've seen of the first moon landing are crap. Remember, back in the day, video cameras and recorders were two different things. So it went like this: camera on moon sends footage to Australia, where it's recorded on tape (and then those tapes were lost), then downsized onto a smaller monitor, which is filmed by another video camera, uploaded to satellite, and disseminated around the world. America watches it on TV, cheers. Some of this footage is filmed off of a television onto 16mm film. This is what goes into the national archives. Crap. So, the original tapes have been found (spoiler: they never left Australia). So what, right? How good could they be, recorded back in the late 60's and all? Pretty darn good, apparently...seems recording heads were much better than the output available at the time (like playing a Blu-Ray disc on a B&W TV), and several recent projects have shown that it's possible to extract very high resolution data from these old analog tapes. How hi-rez? High enough to see Neil Armstrong's nipples get hard. (be sure to click on that picture) So when can we see this amazing footage? Probably soon.

Wowed by welding

lizbunny — Thu, 26 Mar 2009 14:43:21 -0800

Nasa is using friction stir welding to build its new space craft. No blowtorch, no solder, no sparks, no smoke, no ozone and no radiation. Instead, it uses friction to heat materials and then "stir" them together at a molecular level.

Up, Up, and Away

digaman — Tue, 17 Mar 2009 18:46:12 -0800

The 56-Euros-and-a-balloon teenage Catalonian space program.

Did that star just blink?

borkencode — Fri, 06 Mar 2009 14:32:32 -0800

Tonight NASA is scheduled to launch the Kepler Mission (named after planetary legislator Johannes Kepler) with the goal of finding Earth size planets in orbit around stars in the Cygnus-Lyra region of the sky. Over the next 3 and a half years it will maintain a nearly unblinking gaze on the approximately 100 thousand stars in the region. NASA expects it to find about 50 Earth size planets, as well as hundreds that are larger. You can watch the launch live on NASA TV. Currently the smallest known exoplanet is COROT-Exo-7b discovered by the French COROT mission. (previously) Both the COROT and Kepler missions use the planetary transit method of detection, where a planet crossing the face of a star causes a dip in its brightness.

Zeroing out the long term economic stimulus

jeffburdges — Fri, 06 Feb 2009 11:42:08 -0800

Science & technology funding has an enormous long term impact on the economy, a fact that has not escaped China. Yet, Senators Ben Nelson (D-NE) and Susan Collins (R-ME) have proposed cutting all National Science Foundation and Department of Energy Office of Science funding from the Senate American Reinvestment and Recovery Act, along with almost all other proposed funding of the sciences and technological development, as a part of a $77.9B reduction effort. Why? Well, you'll notice that Nebraska & Maine don't contribute much to science & technology in the United States, nor win many grants, and hence no bacon for Nelson and Collins. The proposed cuts include : 50% of NASA exploration for $750M 100% of NSF for $1,402M 35% of NOAA for $427M 38% of NIST for $218M 38% of DOE energy efficiency & renewable energy for $1,000M 100% of DOE office of science for $100M

The Solar Connection

digaman — Wed, 24 Dec 2008 09:01:23 -0800

Rethinking Earthrise. On the 40th anniversary of the NASA's Apollo 8 mission [caution: weird JFK animation], which answered Stewart Brand's epochal, LSD-inspired question "Why haven't we seen a photograph of the whole Earth yet?" with an unforgettable image of a seemingly fragile and isolated blue planet, Nature editor Oliver Morton -- author of a new book on photosynthesis called Eating the Sun -- disputes the notion that the Earth is fragile and isolated. "The fragility is an illusion," he writes. "The planet Earth is a remarkably robust thing, and this strength flows from its ancient and intimate connection to the cosmos beyond. To see the photo this way does not undermine its environmental relevance -- but it does recast it."

Dark Flow

homunculus — Thu, 25 Sep 2008 14:28:16 -0800

Mysterious New 'Dark Flow' Discovered in Space. "As if the mysteries of dark matter and dark energy weren't vexing enough, another baffling cosmic puzzle has been discovered. Patches of matter in the universe seem to be moving at very high speeds and in a uniform direction that can't be explained by any of the known gravitational forces in the observable universe. Astronomers are calling the phenomenon 'dark flow.' The stuff that's pulling this matter must be outside the observable universe, researchers conclude." Here's the paper (subscription required): A Measurement of Large-Scale Peculiar Velocities of Clusters of Galaxies: Results and Cosmological Implications. NASA has preprints you can download: results and implications and technical details (PDFs).

Phoenix Confirms Martian Water, Mission Extended

finite — Fri, 01 Aug 2008 12:22:12 -0800

"We have water," said William Boynton of the University of Arizona, lead scientist for the Thermal and Evolved-Gas Analyzer, or TEGA. "We've seen evidence for this water ice before in observations by the Mars Odyssey orbiter and in disappearing chunks observed by Phoenix last month, but this is the first time Martian water has been touched and tasted."

It Is Rocket Science

netbros — Fri, 30 May 2008 14:02:40 -0800

Assemble a rocket from main engine to payload fairing. Rocket Science 101 shows the basic parts of the launch vehicle, how they are configured, and how they work together to launch a NASA spacecraft. More Friday Flash Fun.

Dr. Ernst Stuhlinger, 1914-2008

Chinese Jet Pilot — Tue, 27 May 2008 16:54:10 -0800

Before developing exotic space propulsion systems like the ion engines on deep space probes, he developed guidance systems for Nazi Germany's ballistic missile, the V2. As Dr. Werner von Braun's Chief Scientist, he was one of the brilliant minds that founded the Marshall Space Flight Center in Huntsville, Alabama and sent astronauts to the moon atop MSFC's Saturn V rocket. Dr. Ernst Stuhlinger, one of the last surviving rocket scientists extracted from Nazi Germany in Operation Paperclip, died today at 94.

How to land at the Martian north pole.

Brandon Blatcher — Wed, 14 May 2008 18:22:55 -0800

Seven minutes of terror. A short video on describing how the Phoenix probe will land at the North Pole of Mars on May 25th. Follow updates to the mission via Twitter and the blog. Previously

Cryogenic Venting

brownpau — Thu, 21 Feb 2008 08:42:32 -0800

Light Reflection: a brilliant fan of cryogenics venting from a relief valve on STS-122 Atlantis' ET (external tank) post-separation. Also see this handheld video of the ET, with money shots at 2:15 and 3:55. Atlantis just landed yesterday, completing the delivery and installation of Columbus. Next up, STS-123 Endeavour delivers Kibo.

Nothing's gonna change my world?

monospace — Thu, 07 Feb 2008 10:05:21 -0800

Fears that malevolent aliens will tune into this week's broadcast of The Beatles' song "Across the Universe" have been voiced by scientists.

Hot space bot uses stirling engine

Artw — Mon, 12 Nov 2007 12:24:57 -0800

NASA proposes using a Stirling cooler (essentially a Stirling engine in reverse) to keep a probe cool on the surface of Venus, which has had a tendency to melt or smash previous probes. The cooler would maintain a 25cm sphere within the probe at 200°C -- 100°C above the boiling point of water but sufficiently cool for a high-temperature microcontroller to operate. The waste heat radiators on the exterior of the sphere would reach the temperature of 500°C, 40°C above the the normal Venusian surface temperature.

We live in a wonderfully insane universe.

brundlefly — Thu, 13 Sep 2007 01:18:55 -0800

NASA Astronomers Find Bizarre Planet-Mass Object Orbiting Neutron Star [via]

Race To Mars

richlach — Fri, 07 Sep 2007 11:35:01 -0800

"Somewhere on the planet are ten-year-olds who, someday, will be the first people to set foot on Mars" 300 scientists and space-experts contributed to what's billed as "a realistic vision of the first Human Mission to Mars" -- Race to Mars. Discovery Channel Canada used Hollywood special effects, but for added realism rather than ray-guns and aliens. On the website, you can argue about whether they got it right. www.racetomars.ca

Party at NASA!!!

loquacious — Fri, 06 Apr 2007 14:08:56 -0800

Bay Area Yuri's Night 2007 Bay Area Yuri's Night 2007 Yuri's Night Bay Area will be held at Moffett Field in the NASA Ames Research Center's massive SOFIA hangar, home to the world's largest aerial observatory. Our host for the evening is pioneering space traveler Anousheh Anasari, the first privately funded female to reach orbit. She is joined by Dr. Chris McKay, world renowned expert in astrobiology and terraformation with the Space Science Division of NASA Ames Research Center, as they welcome you to a dazzling array of interactive art installations and science demos, interwoven with musical and acrobatic performances by some of the world's finest entertainers. Complete write up. Partially via MeFi's own lannanh.

NASA's Earth Observatory

owhydididoit — Fri, 23 Feb 2007 19:38:48 -0800

Sunset on Mars. Crop Circles in Kansas. Total Eclipse. Tenerife. Meteor Crater, AZ. European Superstorm. Lake Effect Clouds. Where on Earth...?
Find these and other images, as well as a learning lab and data animations, online courtesy NASA. If you are patient, also see Visible Earth (previously . . ).

Hubble ACS, We Hardly Knew You

Brak — Mon, 29 Jan 2007 20:22:39 -0800

Hubble's ACS Has Died. Hubble's Advanced Camera for Surveys has apparently gone into safe mode, with little hope of return. The ACS was installed in 2002, and added amazing upgrades to Hubble's imaging capabilities. Though its lifespan was only projected at five years, scientists had hoped it would hold out longer. Though a final shuttle servicing mission is scheduled for 2008, the mission objectives plate is already too full to consider its repair. Alas, more of those beautiful pictures (as well as extended research capabilities) will have to wait until the James Webb Space Telescope is launched in 2013.

Moonbase: Alpha

justkevin — Mon, 04 Dec 2006 20:13:00 -0800

NASA Plans Permanent Moonbase. The base, a potential stepping stone for further Mars exploration, will likely be situated near one of the poles. The advantages of a polar site (pdf) include a relatively moderate climate, possible hydrogen and oxygen resources, unexplored terrain and abundant solar power. They have apparently abandoned plans to use nuclear reactors, which is probably for the best.

HiRISE High-Res Images From Mars - Find the filing cabinet!

carsonb — Sat, 30 Sep 2006 11:09:22 -0800

The HiRISE camera is one of eleven instruments on the Mars Reconnaissance Orbiter. Yesterday the first few images were downloaded from the MRO.

The great antidote to the poison of enthusiasm and superstition

Smedleyman — Thu, 15 Jun 2006 23:58:32 -0800

The return of astronauts to the moon by 2020? Yeah! Hurricane predictions, long-term monitoring of weather and climate change? Not so much. (related here and here)

Convert moon rocks to oxygen and other ways to earn $250,000

blahblahblah — Sat, 06 May 2006 17:04:33 -0800

The NASA Centennial Challenges: Inspired by the X-Prize, NASA has begun a series of challenges to private inventors with cash prizes for things ranging from extracting oxygen from moon rocks to building better astronaut gloves to improving personal aircraft. Thanks to Congressional approval, NASA will be launching larger challenges of up to $50 million in value, including a new multi-million dollar lunar lander contest. With government space efforts criticized by private entrepreneurs, is this the right direction for NASA?

Bush Turns Up the Heat on NASA

digaman — Sat, 28 Jan 2006 16:03:12 -0800

Bush administration tries to silence NASA's chief climate expert James Hansen from granting interviews about global warming. Meanwhile, a new study by Australian researchers confirms that global sea levels are rising, and may make island nations like Tuvalu and the Maldives uninhabitable by the end of the century. [via RawStory]