Quantcast

Latest 81P/Wild Stories

Puzzling Science: Answering Questions About Comets And Asteroids
2012-07-26 04:57:23

Lee Rannals for redOrbit.com - Your Universe Online Astronomers have started to answer questions about two unsolved puzzles about the building blocks of our Solar System. Two questions that have puzzled scientists about comets and asteroids are: How did icy comets obtain particles that formed at high temperatures? And, how did these refractory particles acquire rims with different compositions? Researchers from Carnegie Institution for Science have modeled the trajectories of these...

First Evidence Of Space Weathering Found On Comet Wild2
2012-03-27 09:44:24

The traditional picture of comets as cold, icy, unchanging bodies throughout their history is being reappraised in the light of analyses of dust grains from Comet Wild2. A team led by the University of Leicester has detected the presence of iron in a dust grain, evidence of space weathering that could explain the rusty reddish colour of Wild2´s outer surface. The results will be presented by Dr John Bridges at the National Astronomy Meeting in Manchester on Tuesday 27th March. The...

Scientists Analyze Tiny Comet Grain To Date Jupiter's Formation
2012-03-02 04:12:19

Particles from comet 81P/Wild 2 brought to Earth in 2006 by NASA's Stardust spacecraft indicate that Jupiter formed more than three million years after the formation of the first solids in our Solar System. The new finding helps test Solar System formation theories, which do not agree on the timing of Jupiter though it is certain the formation of this giant planet affected how materials moved, collided, and coalesced during the complex planet-forming process. Published in the February 1, 2012...

Image 1 - NASA Developing Comet Harpoon For Sample Return
2011-12-14 10:29:44

[ Watch the Video ] The best way to grab a sample of a rotating comet that is racing through the inner solar system at up to 150,000 miles per hour while spewing chunks of ice, rock and dust may be to avoid the risky business of landing on it. Instead, researchers want to send a spacecraft to rendezvous with a comet, then fire a harpoon to rapidly acquire samples from specific locations with surgical precision while hovering above the target. Using this "standoff" technique would allow...

Image 1 - Hyperactive Hartley 2 Has A Split History
2011-10-04 12:20:12

The latest analysis of data from NASA's Deep Impact spacecraft shows that comet 103P/Hartley 2 is hyperactive in terms of the material it spews out, compared to the other comets observed up close to date.  The comet also shows surprising diversity - ice on the comet´s sunlit surface is found in patches that are isolated from areas of dust. In addition, one lobe of the dog-bone shaped comet may have lost much more of the primordial material from the formation of the comet than the...

07e4773fae65b16125e1794ee96b0e49
2011-04-06 06:30:00

By Daniel Stolte, University of Arizona The discovery of minerals requiring liquid water for their formation challenges the paradigm of comets as "dirty snowballs" frozen in time. For the first time, scientists have found convincing evidence for the presence of liquid water in a comet, shattering the current paradigm that comets never get warm enough to melt the ice that makes up the bulk of their material. "Current thinking suggests that it is impossible to form liquid water inside of a...

2011-03-25 11:53:00

DENVER, March 25, 2011 /PRNewswire/ -- NASA's Stardust spacecraft, built and flown by Lockheed Martin (NYSE: LMT), sent its last transmission to Earth at 4:33 p.m. PDT (7:33 p.m. EDT) Thursday, March 24, shortly after depleting fuel and ceasing operations. During a 12-year period, the venerable spacecraft collected and returned comet material to Earth and was reused after the end of its prime mission in 2006 to observe and study another comet during February 2011. The Stardust team...

2011-03-25 09:58:00

PASADENA, Calif., March 25, 2011 /PRNewswire-USNewswire/ -- NASA's Stardust spacecraft sent its last transmission to Earth at 7:33 p.m. EDT Thursday, March 24, shortly after depleting fuel and ceasing operations. During an 11-year period, the venerable spacecraft collected and returned comet material to Earth and was reused after the end of its prime mission in 2006 to observe and study another comet during February 2011. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) The...

078d98d7558b2f7eb6162b6d0a1aa2821
2011-03-25 07:35:00

After 12 years of providing NASA with lessons about our solar system, the Stardust spacecraft has sent its last commands to burn off all its fuel. In its final moments, the spacecraft continues to teach us. The "burn to depletion maneuver was designed to fire Stardust's rockets until insufficient fuel remains to continue, all the while downlinking data on the burn to Earth some 312 million kilometers (194 million miles) away," released NASA in a press release. Based on the Stardust-NExt...

2011-02-15 19:49:00

PASADENA, Calif., Feb. 15, 2011 /PRNewswire/ -- NASA's Stardust spacecraft returned new images of a comet showing a scar resulting from the 2005 Deep Impact mission. The images also showed the comet has a fragile and weak nucleus. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO ) The spacecraft made its closest approach to comet Tempel 1 on Monday, Feb. 14, at 8:40 p.m. PST at a distance of approximately 111 miles. Stardust took 72 high-resolution images of the comet. It...


Latest 81P/Wild Reference Libraries

6_348877a21702e82deaef967e7029f7ad2
2004-10-19 04:45:41

Comet -- A comet is a small body from the outer reaches of the solar system similar to an asteroid but composed of ice. Often described as "dirty snowballs," they are composed largely of carbon dioxide ice, methane ice, and water ice with a mixture of dust and small stony aggregates mixed in. Comets are thought to be small pieces of debris left over from the formation of the solar system, representing a sample of the original composition of the nebula that condensed to form the Sun and all...

More Articles (1 articles) »
Word of the Day
grass-comber
  • A landsman who is making his first voyage at sea; a novice who enters naval service from rural life.
According to the OED, a grass-comber is also 'a sailor's term for one who has been a farm-labourer.'