Little is known about the long-destroyed moon-forming planet, Theia. But it may have been born in the inner solar system—just like Earth—a new study suggests ...

Several small worlds beyond Jupiter are not just frozen rubble. Beneath their shining skins, many hide oceans of liquid water ...

Emily Kwong and Regina Barber of NPR's Short Wave podcast talk about the evolutionary history of kissing, how moss spores fare in space, and new clues about the collision that created the moon.

When a meteor streaks across the sky, it's not just beautiful. It's nature's way of delivering a time capsule to Earth.

Currently there is a third “interstellar interloper” now passing through the solar system designated as 3i/ATLAS, for the ...

Key Findings The moon once dismissed as the solar system's most hostile environment may now sit directly in the path of an ...

While the crater-pitted moon may appear geologically dead, researchers have discovered more could be going on under its icy ...

Out in the cold, distant reaches of our solar system, many moons are wrapped in thick layers of ice. At first glance, these ...

There are several frozen moons in our solar system, orbiting the gas giants. Some of them, despite having temperatures that would make Antarctica feel tropical, have liquid water under the surface.

That’s also true for the other moons that provide the gravitational stress. As a result, the internal oceans may actually ...

According to the leading theory of how the Earth-Moon system formed (the Giant Impact Hypothesis), a Mars-sized object (named ...

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