Mars at sunset reveals dozens of razor-thin atmospheric layers in stunning detail, helping scientists map dust and ice ...

Meteors from the Ursids appear near the Little Dipper, which is part of the constellation Ursa Minor. Only skywatchers in the Northern Hemisphere will have a chance of seeing this shower. The moon ...

Scientists watching the nearby Fomalhaut star system have directly seen two protoplanets smash together for the first time. Then, they saw it happen again.

The Ursids will peak around the time of the winter solstice under dark skies with chances of enhanced meteor activity.

Sunlight looks smooth and white to the naked eye, but when I break it apart with a prism or a spectrograph, it turns out to be riddled with gaps. Instead of a perfect rainbow, the Sun’s light is ...