A rare full seven-planet alignment will be visible in the early night sky between Feb. 22 and 28. We have the tips you need ...

In the vast expanse of space, beyond the commonly known boundaries of our solar system, lies the tantalizing possibility of ...

Mercury has had enough of the sun's solar flares, so he goes to Venus to share his orbit. But is this such a good idea?

Mars, Venus, Jupiter, Saturn and Mercury will shine bright enough for the naked eye to see, and you can catch glimpses of Uranus and Neptune with binoculars or a telescope.

Planet demographics reveal a puzzling lack of worlds in a certain size range throughout the galaxy F or centuries our solar ...