News tagged with comet

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Near-Earth asteroid is really a comet

Some things are not always what they seem—even in space. For 30 years, scientists believed a large near-Earth object was an asteroid. Now, an international team including Joshua Emery, assistant professor ...

Sep 10, 2013
4.8 / 5 (18) 15 | with audio podcast

Rosetta-comet will wake up early

(Phys.org) —On its way towards the Sun comet Churyumov-Gerasimenko, next year's destination of ESA's spacecraft Rosetta, will start emitting gas and dust earlier than previously expected. The comet's activity ...

Aug 20, 2013
5 / 5 (1) 0 | with audio podcast

Hubble brings faraway comet into view

(Phys.org) —The NASA Hubble Space Telescope has given astronomers their clearest view yet of Comet ISON, a newly-discovered sun grazer comet that may light up the sky later this year, or come so close to ...

Apr 23, 2013
4.9 / 5 (14) 5 | with audio podcast

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

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