Amazing Space HD Video

Stars are celestial objects that generate their own energy by fusing gases together. There are eight planets in our solar system, some 170 natural planetary satellites (moons), and innumerable asteroids, meteors, and comets. In the solar system, there are eight planets: Mercury, Venus, Earth, and Mars are the four inner terrestrial planets, while Jupiter, Saturn, Neptune, and Uranus are the four outer planets. Earth is the third planet from the Sun and the solar system's fifth largest planet by size and mass. The age of the Earth is estimated to be 4.54 billion years. The only planet known to support life is Earth. Earth has liquid water, an oxygen-rich atmosphere, and is shielded from the damaging radiation of the Sun. A black hole is an area of spacetime where gravity is so powerful that nothing can escape it, including particles and electromagnetic waves like light.