Potentially habitable exoplanets are so incredibly common that astronomers have started to consider more unusual situations ...

When you look up in the night sky, our moon is unmissable.Just like Earth, it's round and has a solid, rocky surface. But is ...

A so-called “planet parade,” when multiple planets appear in the night sky at the same time, is underway and will march ...

The universe is full of surprises—like planets so massive they outsize some stars. Explore the fascinating size comparisons that challenge the norm!

Astronomers are on the hunt for a mysterious ninth planet, known as Planet Nine, which could change our understanding of the solar system. Is this hidden world real, or just a myth?

"We must rethink how we create computer models for planet formation and early evolution in the young universe." ...

The innermost Earth-like planet in the famous TRAPPIST-1 system might be capable of supporting a thick atmosphere after all, ...

Astronomers are often asked how the casual observer can distinguish planets from bright stars in the night sky.

Called Kepler-51, the Sun-like yellow dwarf star was found in 2012 to have three exoplanets in its orbit; each, it would turn ...

Using data from NASA's now-defunct Dawn spacecraft, scientists have discovered that the dwarf planet Ceres, the second wettest body in the solar system after Earth, could have an interior reserve ...