Watch our nearest planetary neighbor 'transit' across the sun on Tuesday. You're going to want to some good eye protection.
There's an interesting effect we can sometimes see regarding the moon. It happens when only a tiny sliver is visible shining on one side.
Why is the earth round? Why isn't it a cube or a pyramid?
Scientists armed with diamond anvils are pushing their investigations deeper and deeper into the center of Earth without actually having to go there.
Here's an odd thing about weightlessness: if it were possible to live in the center of the earth we would be weightless there, too!
An asteroid will whiz by Earth at 29,000 miles per hour. That could cause a big impact, but do we really have anything to worry about?
Mysteries, facts, and the age of the diamond you've been eying...
Kepler’s Telescope has detected over 1200 possible planets. But this discovery is unique. Scientists found two planets in the same orbit in a system!
The Earth is made up of plenty of elements but Chromium is uncommon. This has scientists puzzled.
Why are the planets where they are instead of somewhere else?