The 500th exoplanet discovered

Astronomers have discovered 508 planets including the eight in our solar system, but we aren’t really sure which is the 500th, due to t ...

Air Date: November 29, 2010

Sky Talk Survey

Would you go on a one-way trip to Mars knowing that you might not have a way to get back to earth? ...

Air Date: October 27, 2010

SkyTalk TRIVIA!

(Photo: Space.com) Which asteroid has a history of frequently changing ...

Air Date: October 20, 2010

SkyTalk TRIVIA!

Test your knowledge:Question:  What substance does not shrink when it freezes?Answer: Water! A stepping stone t ...

Air Date: October 13, 2010