Austin, TX — Astronomers announced today that a mystery object orbiting a star 170 light-years from Earth might have formed from the collision and merger of two protoplanets. The object, known as ...

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 ...

(CNN) — A collision between giant asteroids likely occurred in a neighboring star system called Beta Pictoris in recent years, and two different space observatories are helping to tell the tale. The ...

Pluto landed its largest moon, Charon, with a 'kiss'—overturning decades of scientific assumptions about how planetary bodies form and evolve. This is the conclusion of a new study, conducted at the ...

Pluto landed its largest moon, Charon, with a 'kiss'—overturning decades of scientific assumptions about how planetary bodies form and evolve. This is the conclusion of a new study, conducted at the ...

“The James Webb Telescope: Are We Alone?” on The Whole Story With Anderson Cooper offers an inside look at the most powerful telescope ever built. The show premieres Sunday, June 16, at 8 p.m. ET/PT ...