In 'Moon,' which explains the movement of the moon around the earth, you can move sliders to see the date, time, and what the moon looks like from a certain position on Earth.

Around 18 percent is occasionally observable on Earth thanks to inconsistencies in the moon’s movement, slight twists and turns that show off slivers of the far side surface. And the other 82 percent ...

An newly discovered asteroid will be captured by Earth's gravity this fall. The "mini-moon" will spend about two months in Earth's orbit, before being flung back on its normal path around the sun.