The giant planets weren't always where we find them today. Jupiter, Saturn, Uranus and Neptune formed in a more compact ...

Jupiter is the largest planet in the solar system, known for its massive size, strong gravity, powerful storms and many moons ...

Some of the planets in our Solar System are gigantic. But what if they got even bigger? Let’s go up the planetary size chart ...

Legend has it that somewhere beyond Neptune and Pluto, there is a ninth planet, with a mass that is five times greater than ...

Even the best telescopes can’t see exoplanets. It’s all about watching for jiggly stars, blue shifts, and transits.

How common are Earth-like planets in the universe? When I started working on supernova explosions, I never imagined that my ...

Astronomers discovered a new moon of Uranus and hundreds of moons around Saturn over the past year, and there may be many ...

3I/ATLAS has now made its closest approach to the sun and Earth and is now heading back out toward the outer solar system. On ...

Fomalhaut lies about 25 light-years away in the constellation Piscis Austrinus, aka the Southern Fish, and is one of the ...

By tracking tiny stellar wobbles, astronomers have detected planets forming around young stars for the first time.

Astronomers rarely see distant planets directly, instead tracking tiny stellar wobbles and fading light. How do these subtle ...

The cold and remote planets originally earned their label of "ice giants" to contrast their interiors from those of Jupiter ...