This gorgeous eight-hour exposure reveals the colors of stars as they make their way across the night sky, colors that can inform astronomers about the characteristics of each star.

A crescent moon will appear alongside the bright stars Castor and Pollox to form a lopsided grin in the night sky on May 29. Skywatchers in the U.S. will find the cosmic smile hanging above the ...

The prototype BlueWalker 3 satellite is now one of the brightest objects in the night sky. Astronomers are worried about even bigger, brighter satellites that are on the way.

One of the brightest objects in the night sky isn’t a star or a planet — it’s a communications satellite. The BlueWalker 3 satellite, launched in September 2022, is now the eighth-brightest ...

A crescent moon will appear alongside the bright stars Castor and Pollox to form a lopsided grin in the night sky on May 29. Skywatchers in the U.S. will find the cosmic smile hanging above the ...

Still, the planetary parade, as the event is colloquially named, “makes for a very nice excuse to go outside at night, maybe with a glass of wine, and enjoy the night sky.” A Parade of Planets ...