The thin, outermost ring in the photo is composed of particles shepherded by the gravity of two moons orbiting around it.

Originally, the hypothesis was that Theia gave the Earth a glancing blow, and the proto-Earth and Theia lost pieces ending up as one or two moons that eventually formed the Moon. It was thought that a ...

The ultimate purpose of PUNCH is to use its four instruments — three wide-field imagers (WFI) and a near-field imager (NFI) — ...

New research suggests meteor showers are so unpredictable due to the Sun’s own motion around the solar‑system barycenter.

In a memorable image from the 1977 film "Star Wars," the young hero Luke Skywalker gazes at two suns setting above the ...

Over 4.6 billion years ago, Earth took shape from a spinning cloud of dust and gas surrounding the young sun. Tiny particles ...

Lingering Brightness Provides Evidence for How the Planet Met Its Demise Each year, scientists from around the world compete ...

Using the radial velocity method, an international team of astronomers has discovered a new extrasolar planet orbiting a ...

Meet the author: Dr. Phil Plait is an astronomer, author, and science communicator with a PhD in astronomy at the University ...

New observations upended scientists' standing hypothesis about how a star would engulf a planet, causing its demise.

Observations from NASA's James Webb Space Telescope have provided a surprising twist in the narrative surrounding what is ...