The Red Planet comes closest to Earth, disappears behind the Moon in an occultation, and finally reaches opposition in the ...

In 1831, a massive volcanic eruption cooled the Earth’s atmosphere by 1 degree Celsius and even caused the Sun to appear in ...

Worlds will align for a "planetary parade" in January, with four bright and easily visible to the naked eye. But an even ...

A newly-discovered comet might light up the night sky in the coming weeks, possibly shining even brighter than the planet ...