From earliest times, humans have looked to the sky in wonder, and their wonder and curiosity fueled science. Ancient peoples built enormous temples and monument

The universe is full of space phenomena, such as dark matter, dark energy, and the beginning of the universe. Read what astronomers and space scientists have di

From earliest times, humans have wondered about the sky above them. People looked at distant stars and wondered what they were made of. They wondered whether an

Presents information about the asteroids, comets, and meteors found in the solar system, describing their physical components, orbits, and the effects of their

Describes seven phenomena about the outer planets of the solar system and their moons, including the great red spot of Jupiter and the underground sea of Europa