NASA finds Earth's moon didn't need hundreds of years to form. Try hours.

via https://ift.tt/PXl6aEz Watch a violent collision simulation that could have spawned the moon.

When the universe has seemed a vast, lonely place, people have taken comfort in Earth's steadfast companion — the moon — ever-marching through space with this planet on an odyssey around the sun.

But at one time, some 4.5 billion years ago, the moon wasn't around. … NASA finds Earth's moon didn't need hundreds of years to form. Try hours.