A radio telescope in South Africa has unearthed a giant galaxy—dubbed a "cosmic megastructure"—with plasma jets that measure ...

Six of our cosmic neighbors are expected to line up across the night sky tonight, in what has been dubbed a "planetary parade ...

European Southern Observatory Director General Xavier Barcons told Space.com that astronomers expect the project to brighten ...

The six planets will be visible in the days immediately leading up to Jan. 21, and for about four weeks afterward. Mars, ...

Venus, Saturn, Jupiter and Mars are all visible after sunset, but social media claims about it being a rare "planetary ...

Astronomers are raising concerns about the impact of light pollution from a renewable energy project on the world’s most ...

Venus and Saturn will be in conjunction this weekend, appearing side by side in the night sky during January's post-sunset ...

ESO estimates the complex will leak as much light pollution as a city with a population of about 20,000. Parts of the ...

Venus, Saturn, Jupiter and Mars will be visible together all month after dark, NASA reports. The four planets have been ...

Alignments of five or more planets are rare—there will be two more featuring five or more planets this year, but after that ...

A little-known chapter of the Hubble Space Telescope’s history is a reminder of the risks of looking at the sun ...

Plus: Saturn’s moon Iapetus is visible, our Moon passes the bright star Spica, and Mars skims south of Pollux in Gemini in ...