A collision between our Milky Way galaxy and the neighboring Andromeda galaxy, long considered inevitable, may be in question, astronomers say.

The collision theory, also known as the "Giant Impact Hypothesis", proposes that the moon was created from the debris of a massive collision between the early Earth and a Mars-sized protoplanet, ...

Back in the 80s, experts thought the moon was a result of an explosive collision with the protoplanet Theia - but a new study indicates this may not be the case.

Scientists propose a shocking new theory for the origin of the moon - and claim the popular 'collision theory' is WRONG. READ MORE: Our moon went through physical changes during Covid By WILIAM HUNTER ...

January 1998. The idea that the Moon formed from a giant collision now seems to be the leading theory to explain its existence. One of the most puzzling properties of the Moon is that it has much ...

Pluto likely acquired large moon Charon in a “kiss and capture” collision billions of years ago. It may have created a subsurface ocean on the icy dwarf planet.

A new study, using convection models, shows that Earth’s collision with the protoplanet Theia some 4.5 billion years ago, might’ve triggered early subduction in Earth’s crust.