Interesting facts about space, galaxies, planets, moons and other solar system objects. Explore the universe through interesting diagrams, photos and more!

The initial “glow” of the Big Bang can be seen throughout space today as the cosmic microwave background radiation (CMB). Because the universe has now expanded out beyond 13.7 billion …

The largest planet in the solar system is Jupiter, followed by Saturn, Uranus, Neptune, Earth, Venus, Mars with the smallest being Mercury. The table below shows the size of the planet, …

Jul 30, 2012 · A collection of cool facts about the Sun and all the planets in our solar system (sorry Pluto). The Sun makes up 99.86% of the Solar System’s mass. Mercury is named after …

It is an almost perfect sphere of super-hot gases whose gravity holds the solar system together. The energy produced by the Sun is essential for life on Earth and is a driving force behind the …

The solar system consists of the Sun, planets, dwarf planets, moons, and numerous smaller objects such as comets and asteroids. 194 moons, 3,583 comets and 796,289 asteroids have …

The Earth is the only planet in our solar system not to be named after a Greek or Roman deity. The Earth was formed approximately 4.54 billion years ago and is the only known planet to …

Solar Eclipse Facts What is a Solar Eclipse? A solar eclipse is a natural event that takes place on Earth when the Moon moves in its orbit between Earth and the Sun (this is also known as an …

Galaxy Facts A galaxy is a massive, gravitationally bound system that consists of stars, stellar objects (such as brown dwarfs and neutron stars), nebulae, an interstellar medium of gas and …

Best known for its fabulous ring system, Saturn is the sixth planet from the Sun and the second largest in our solar system. Like Jupiter, Saturn is a gas giant and is composed of similar …