Most theories claim the Moon formed out of the debris of a collision between the Earth and an object about the size of Mars, called Theia, coalescing in orbit over months or years. A new simulation ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. An asteroid simulator shows the devastation that would be inflicted on ...

Computer simulations show that a crash between evenly sized planetoids creates a Pluto and a Charon, plus a debris disk that could have become Pluto's other two satellites. John Matson reports Imagine ...

A detailed simulation of Theia crashing into Earth. While the collision was violent, it was not energetic enough to melt the Earth's lower mantle -- meaning that remnants of Theia could be preserved, ...

University of Tokyo researchers have created their “most accurate simulation” on supercomputers of what happens when two galaxies merge, using a range of scenarios to better understand the phenomena.