We already know a decent amount about how planets form, but moon formation is another process entirely, and one we're not as familiar with. Scientists think they understand how the most important moon ...

Two primary theories explain planetary moon formation: gravitational capture within a planet's Hill sphere radius and simultaneous formation with the solar system during its accretion disk phase. A ...

The Moon formed a little later than previously assumed. When a Mars-sized protoplanet was destroyed in a collision with the young Earth, a new body was created from the debris ejected during this ...

An interdisciplinary international research team has recently discovered that a massive anomaly deep within the Earth’s interior may be a remnant of the collision about 4.5 billion years ago that ...

probably orbited the sun at very similar distances — like twin planets. Another explanation could be that the moon and the earth (as it is today) both received the same proportion of material from ...

A new study of lunar minerals has captured the last stage of the moon solidifying into rock. A full moon is visible above icebergs in Disko Bay, Greenland. Scientists studying lunar samples brought ...