
Mars Moon Nearly Shattered by Giant Impact Crater
The largest crater on Mars' moon Phobos is so massive it almost destroyed the entire moon when it formed. New details reveal the violent history of this tiny space rock orbiting the Red Planet.
Read the latest positive news, breakthroughs, and inspiring stories about phobos, curated daily by BrightWire.

The largest crater on Mars' moon Phobos is so massive it almost destroyed the entire moon when it formed. New details reveal the violent history of this tiny space rock orbiting the Red Planet.

On August 17, 1877, American astronomer Asaph Hall spotted Mars' largest moon through the world's biggest telescope. His discovery opened the door to understanding our planetary neighbor in ways that changed space exploration forever.

For the first time in human history, a spacecraft has photographed Earth disappearing behind another object from the surface of another planet. NASA's Perseverance rover caught our home world playing cosmic peek-a-boo with Mars' moon Phobos.