Callisto, the third largest moon in the entire solar system, orbits Jupiter from about 1.2 million miles away. The rocky ...

The presence of an ocean leaves open the possibility that it could host life. Another nearby moon, Europa, is also considered ...

I pick out North America’s celestial highlights for the week ahead (which also applies to northern hemisphere mid-northern ...

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but with a telescope you can spot Neptune and Uranus.

Astronomers for the first time have deciphered the three-dimensional structure of the atmosphere of a planet beyond our solar ...

In January 2025, Venus, Mars, Jupiter, Saturn, Uranus and Neptune were all visible in the night sky. And in February, 2025, ...

Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short ...

A recently discovered asteroid, named 2024 YR4, is now the riskiest asteroid ever detected. On Tuesday, NASA calculated that ...

A tiny star is making big moves — whether its accomplice likes it or not. Astronomers have spotted a star just a fraction the ...

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto ...

NASA said the system is thought to be moving at least 1.2 million miler per hour, nearly twice as fast as our solar system.