Which planet is the furthest from the sun? Some may think it’s Pluto, but it’s actually Neptune. Learn more about this ice ...

When astronomers search for planets that could host liquid water on their surface, they start by looking at a star's habitable zone. Water is a key ingredient for life, and on a planet too close to ...

Astronomers are just beginning to scratch the surface of the complex, and sometimes violent, relationships between planets ...

The outer planets of the solar system are swarmed by ice-wrapped moons. Some of these, such as Saturn's moon Enceladus, are ...

Pluto's largest moon, Charon, likely formed through a capture event in the early, crowded Kuiper Belt. Three-body encounters ...

Today, as Mercury, the planetary ruler of facts and communication, connects to Pluto, planet of power and hidden truth, a ...

"The Pluto flyby happened, and I was in the right place at the right time - perfectly positioned to fall in love with it," ...

Journey beyond Neptune to uncover the frozen, mysterious worlds that challenge everything we thought we knew about the solar ...

Nearly a century after Pluto’s discovery, astronomers are still hunting for mysterious planets beyond Neptune - including a ...

Explore the evolving rare earth hypothesis, highlighting new findings on habitability and the conditions for complex life on exoplanets.

Is a sun a star or a planet? While science now agrees the sun is a star, new telescopes may soon challenge how we define solar objects.

Astronomers have discovered that aging stars may be devouring their closest giant planets as they swell into red giants. Using NASA’s TESS telescope to study nearly half a million stars, scientists ...