Happy International Year of Astronomy! Capitalizing on the fact that 2009 marks the 400th anniversary of Galileo’s earliest telescopic forays into the night sky, the International Astronomical Union ...

Observing the phases of Venus helped Galileo conclude that planets in our solar system orbit the sun, not the Earth. Credit: Creators.com illustration Ask your friends and neighbors, and most will ...

Volcanic activity is not unique to Earth: traces of volcanic activity, such as lava tubes, have been found on Mars and the moon. Now, the University of Trento has demonstrated the existence of an ...

When scientists recently took a closer look at archival images of the surface of Venus, they discovered something new: evidence of volcanic activity on Earth's "twin." The NASA Magellan spacecraft ...