Outer Space Discover celestial objects and phenomena beyond Earth’s atmosphere. Learn about our solar systems or the stars and galaxies far away. MOONPROPERTIESSOLAR SYSTEMSTARS AND GALAXIESTHE SUN The Moon Lunar Maria: Volcanic Basins on the MoonHow Big Is the Moon?How to Measure the Distance to the MoonMoon Gravity: Your Weight on the Moon9 Facts About the Moon [Infographic]How Did the Moon Form? Moon | Outer Space What Color Is the Moon? The color of the moon is mostly grey. And the lunar maria are dark grey. The 4 most dominant rocks are: mare basalts, breccia, anorthosite and regolith.What Are the 8 Major Phases of the Moon?How Far Is the Moon? Earth Properties The 17 Spheres of Earth 100 Earth Facts: The Scientific List of Facts About EarthHow Fast Does the Earth Spin? Earth vs The EngineeredWhere is the North and South Pole?A Guide to Earth’s LithosphereHow To Define the Geosphere Earth Statistics: Straight-Up Stats of Earth How Gravity Sculpted the EarthEarth Age: How Old Is the Earth?Planet Formation and the Core Accretion TheoryEarth Tilt: 23.5 Degrees AxisDensity of Earth: What is the Earth Made Of? Why Does the Earth Hum? Shape of the Earth: The Oblate SpheroidChandler Wobble: Why Earth Wobbles Like a Toy TopWhat is Earth’s Escape Velocity?Why Do We Have Seasons?Earth Rotation: The Day-Night Boundary Solar System Near Earth Objects (NEO): Are We at Risk of an Impact Collision?What’s the Difference Between Meteors, Meteorites and Meteoroids?Facts About Asteroids and Our Asteroid BeltMars Atmosphere Compared to Earth Outer Space | Solar System A Visual Guide to Our Solar System [Infographic] Our solar system is a 4.57 billion years old planetary system that includes a central star and all the natural space objects (planets) orbiting the Sun.Planets: Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune Stars, Galaxies, and Universe Outer Space | Stars, Galaxies and Universe Earth’s Doppelgängers: A List of Earth Like Planets Today, you’re going to disover a whole list of Earth like planets. Like Kepler 62, Gliese-581c and Proxima Centauri b. These are Earth’s Doppelgängers.Alpha Centauri (Rigil Kentaurus): Our Sun’s Closest NeighborSupermassive Black Holes: The Center of Galaxies [Infographic]What is the Goldilocks Zone?The History of the Universe: The Big Bang and Beyond [Infographic]What Are the 3 Types of Galaxies?Milky Way Galaxy: 200 Billion Stars and Our Solar SystemUniverse Expansion: The Farthest Galaxy from Earth [Infographic] The Sun Main Sequence Star: Our Sun’s Thermonuclear Reaction5 Facts About the Sun [Infographic]Sun Fusion: How the Sun Heats Up Earth Outer Space | Sun Solar Radiation: How Sunlight Heats the Planet Our sun is 99% of the total mass of the solar system. It’s this energy from the sun’s thermonuclear reactions that heats the Earth from solar radiation.