About 4.5 billion years ago, a colossal impact between the young Earth and a mysterious planetary body called Theia changed ...

Astronomers might have found evidence of a structure located farbeyond Neptune, potentially giving us clues about the solar ...

Where did the planet the size of Mars that crashed into Earth billions of years ago come from? Theia has captured the ...

"The most convincing scenario is that most of the building blocks of Earth and Theia originated in the inner solar system.

New research suggests that Theia, the object whose collision with Earth is theorized to have caused the formation of the moon ...

Astronomers observing 3I/ATLAS have detected sharply focused, sunward-facing jets unlike anything seen in normal comets, ...

An interstellar trespasser known as 3I/ATLAS is almost certainly a comet. So, why do so many people think it's ...

Jupiter’s early growth carved rings in the solar system, delayed meteorite formation, and kept planets like Earth in stable ...

Simulations reveal that Jupiter’s rapid growth disrupted the early solar system, creating rings where new planetesimals ...

If you've ever wondered why we are here, then you can thank Jupiter for part of the answer. A new study from Rice University ...

Pluto pulled Adeene Denton into its orbit during her undergraduate internship at the Lunar and Planetary Institute in Houston. It was summer 2015, when the New Horizons spacecraft zoomed past the ...