Earth is home to some truly bizarre and breathtaking landscapes — here are 20 that look straight out of an alien world.

Shaped like a megaphone, the upcoming mission will map the entire sky in infrared light to answer big questions about the ...

In February, six planets will align in the night sky — Saturn, Mercury, Neptune, Venus, Uranus, Jupiter and Mars — and be mostly visible to the naked eye. We find out how to see and more about this ...