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 ...

Sharks are older than a surprising amount of things, both on Earth and in the rest of the universe. While sharks have seen evolutionary changes in the 450 million years they have been around, their ...

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