From our tiny blue planet to the edge of the observable universe, this video takes you on a breathtaking journey of scale. We’ll explore the distances between Earth, the Moon, Mars, Neptune, and ...

Mars is about 140 million miles from our cozy planet. A human mission to that cold, rocky neighbor would mean being away from Earth for about 3 years. But the things those explorers would see and ...

According to the equations that govern black holes, the larger one of these cosmic behemoths is the lower its average density – given that the universe contains a lot of relatively empty space, could ...