Astronomers have spent years searching for a possible hidden giant planet far beyond Neptune. Unusual orbits among distant ...

Venus, Jupiter and Mercury are due to form a planet parade in June visible across the US. What to know, including the date ...

"It’s incredible to think there was once a world this large." The post Scientists Find Chunk of Lost Planet in Desert ...

Four-and-a-half billion years ago, a massive world—possibly as big as the moon or even Mars—orbited our sun before crashing ...

In their study, the astronomers found that a supermassive black hole’s outer disk and torus could foster this cumulative ...

Astronomers have investigated a puzzling binary star system in which two stars that may have formed together now show ...

Using a new technique that partly relies on artificial intelligence, researchers spotted potentially more than 10,000 new exoplanets.