An international team of astrologers claim to have discovered a 'super Earth' that's bigger than our own blue planet but smeller than Neptune.

Large hailstones made of ammonia may explain why the gas is missing from large pockets of Jupiter's atmosphere.

From spellbinding images to groundbreaking scientific discoveries, we look back on some of Hubble's most exciting milestones.

Pluto was discovered in 1930 in Arizona, but in 2006 scientists decided to cut Pluto from the planetary line up. Here is why ...

NASA has recently shared groundbreaking footage of Mars, offering the clearest images of the red planet ever captured by the ...

Recent flybys of the fiery world refute a leading theory of its inner structure — and reveal how little is understood about ...

It wasn’t until NASA’s James Webb Space Telescope (JWST) turned its eye to the scene that the story took an unexpected turn.

A burst of solar wind triggered a planet-wide heatwave in Jupiter’s upper atmosphere, say astronomers at the University in Reading, UK. The hot region, which had a temperature of over 750 K, ...

In May 2020, astronomers observed a planetary engulfment for the first time that they believed was caused by a star expanding to become a red giant–swallowing an orbiting planet in the process.

Cameron McWhirter covers national affairs for The Wall Street Journal from Atlanta. Before joining the Journal, he reported for the Atlanta Journal-Constitution from 2003 to 2010. Previously, he ...

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

In celebration of the 35th anniversary of the legendary space telescope’s launch, here are 35 of our favorite images it has ...