Latest 81P/Wild Stories
How did icy comets obtain particles that formed at high temperatures? And, how did these refractory particles acquire rims with different compositions?
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.
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.
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.
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 discovery of minerals requiring liquid water for their formation challenges the paradigm of comets as â€œdirty snowballsâ€ frozen in time.
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.
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.
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.
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.
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...
- Small missiles, especially grape, canister, fragments of iron, and the like, when fired, as upon an enemy at close quarters.
- To fire mitraille at.