Star clusters are stellar groups held together by gravity, which are born together in cosmic nurseries. Open clusters, such as the Hyades and Pleiades, are youngish and look like loose groups ...

Warm summer nights in August offer a front-row seat to some of the most mesmerizing star clusters in the sky. According ...

The bright stars Castor and Pollux will be positioned to the left of the moon in the early morning hours of Aug. 19. Mercury, meanwhile, will be visible close to the horizon, but will swiftly become ...

Mark your calendar so you can catch Mercury, Venus, Jupiter, Saturn, Neptune and Uranus in the sky at the same time.

To say sharks are ancient is a behemoth of an understatement. They evolved around 450 million years ago, before Saturn’s ...