Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the ...

Evidence that rocky planets beyond Jupiter formed as rapidly, and at the same time, as the inner planets could transform our ...

"It is possible that a planet once existed in the solar system but was later ejected, causing the unusual orbits we see today ...

Astronomers have discovered the earliest seeds of rocky planets forming in the gas around a baby sun-like star, providing a ...

A new study from NYU Abu Dhabi has found that high-energy particles from space, known as cosmic rays, could create the energy ...

Almost everything you could want to know about the closest planet to the Sun, Mercury. Real HD photos and videos taken by the ...

The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

Two meteorites found in the Sahara in 2023 might be from Mercury, a study suggests, but doubts remain due to how little is known about the planet closest to the sun.

Astronomers have spotted a planetary system being conceived from the swirl of gas and dust surrounding a star, giving us an ...

Astronomers have discovered the earliest seeds of planets forming around HOPS-315, a baby star located 1,300 light-years away ...

It’s a direct glimpse of the hot region where rocky planets like Earth are born,” said Melissa McClure of Leiden Observatory ...