Skywatchers worldwide are in for a charming cosmic display before the Sun rises Friday, as three celestial bodies will appear in close conjunction.

April’s planetary parade has fewer planets. Only four will line up: Venus, Saturn, Mercury and Neptune. April's parade of ...

A dazzling snapshot from ESO’s Paranal Observatory captures a rare sky parade — the Moon, a comet, and nearly every visible planet strung across the heavens. This celestial lineup is an optical ...

Using NASA's Transiting Exoplanet Survey Satellite (TESS), an international team of astronomers have detected a new sub-Neptune exoplanet orbiting a bright G-type star. The newfound alien world, ...

Skywatchers can enjoy a celestial alignment of the crescent moon, Venus, and Saturn on April 25, with Mercury visible near ...

In February, stargazers enjoyed a rare occurrence: All seven of Earth's planetary siblings dotted the night sky at once. And ...

If anything is indeed living on the planet, it likely would be microorganisms akin to Earth's phytoplankton. Some, called rogue planets, don't even orbit a star, but are floating through the ...