Phobos and Deimos are the remnants of a much larger Martian moon blown apart one billion years ago
The moons of Mars — Phobos and Deimos — are two fragments of what was once a much larger Martian satellite that was blown apart by a huge collision, a study finds. It is thought the collision between the moon and a stray rock, potentially an asteroid, occurred between one and 2.7 billion years ago … Read more