Outer space contains more incredible phenomenons and unsolved mysteries than anywhere else—and we think it's just fascinating. Join Hank for an incredible tour of our solar system in this SciShow ...

Scientists traced the Moon's parent planet Theia to the inner Solar System, solving a 4.5-billion-year mystery.

About 4.5 billion years ago, a colossal impact between the young Earth and a mysterious planetary body called Theia changed everything—reshaping Earth, forming the Moon, and scattering clues across ...

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 ...

Earth and the planetary object that gave rise to the Moon were likely born in the same region of the solar system.

"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 ...

NASA officials dismissed theories that the interstellar 3I/ATLAS could be an alien spaceship while dropping new photos of the ...

A flying piece of cosmic rock or an alien threat? Comet 3I/ATLAS is hurtling through our solar system and captivating ...

In the upcoming issue of the journal Science, researchers determine the possible composition of Theia, the body that collied with Earth 4.5 billion years ago thus creating the Moon. The impactor’s ...

While none of the spacecraft have cameras perfectly designed to spot comets zipping by at speeds up to about 153,000 miles per hour (246,000 kilometers per hour), astronomers didn’t want to miss what ...