News tagged with comet

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Collision course? A comet heads for Mars

Over the years, the spacefaring nations of Earth have sent dozens of probes and rovers to explore Mars. Today there are three active satellites circling the red planet while two rovers, Opportunity and Curiosity, ...

Mar 28, 2013
4.6 / 5 (13) 16 | with audio podcast

How a sunset comet came to be

(Phys.org) —For a comet, visiting the sun is risky business. Fierce solar heat vaporizes gases long frozen in the fragile nucleus, breaking up some comets and completely destroying others.

Mar 18, 2013
5 / 5 (2) 0 | with audio podcast

Is a comet on a collision course with Mars?

There is an outside chance that a newly discovered comet might be on a collision course with Mars. Astronomers are still determining the trajectory of the comet, named C/2013 A1 (Siding Spring), but at the ...

Feb 27, 2013
5 / 5 (15) 26

Year three: NASA SDO mission highlights

On Feb. 11, 2010, NASA launched an unprecedented solar observatory into space. NASA's Solar Dynamics Observatory (SDO) flew up on an Atlas V rocket, carrying instruments that scientists hoped would revolutionize ...

Feb 13, 2013
5 / 5 (4) 0

A fascinating 'new' planet

NASA has recently discovered a very strange planet.  Its days are twice as long as its years.  It has a tail like a comet. It is hot enough to melt lead, yet capped by deposits of ice. And to top it all ...

Feb 11, 2013
4.7 / 5 (31) 8 | with audio podcast

A possible naked-eye comet in March

Far beyond the orbits of Neptune and Pluto, where the sun is a pinprick of light not much brighter than other stars, a vast swarm of icy bodies circles the solar system. Astronomers call it the "Oort Cloud," ...

Feb 09, 2013
5 / 5 (7) 6 | with audio podcast