Witness the spectacular and destructive consequences of a collision between the solar system's two largest planets.

In a memorable image from the 1977 film “Star Wars,” the young hero Luke Skywalker gazes at two suns setting above the horizon on his desert planet Tatooine. Astronomers since then indeed have ...

But then scientists at the International Astronomical Union decided Pluto didn’t quite make the cut, it lacked the ...

Recent flybys of the fiery world refute a leading theory of its inner structure — and reveal how little is understood about ...

When a planet's orbit brings it between Earth and a distant star, it's more than just a cosmic game of hide and seek. It's an ...

"These early images of Donaldjohanson are again showing the tremendous capabilities of the Lucy spacecraft as an engine of ...

NASA's Lucy spacecraft will swoop past a small asteroid this weekend as it makes its way to an even bigger prize: the ...

New research suggests meteor showers are so unpredictable due to the Sun’s own motion around the solar‑system barycenter.

Why do comets and their meteoroid streams weave in and out of Earth's orbit and their orbits disperse over time? In a paper ...

NASA’s Lucy spacecraft is closing in on its second close encounter with an asteroid, expected to happen on April 20, 2025.

Lingering Brightness Provides Evidence for How the Planet Met Its Demise Each year, scientists from around the world compete ...