Outer Space Discover celestial objects and phenomena beyond Earth’s atmosphere. MOONPROPERTIESSOLAR SYSTEMSTARS AND GALAXIESTHE SUN The Moon Lunar Maria: Volcanic Basins on the Moon How Big Is the Moon? How to Measure the Distance to the Moon Moon Gravity: Your Weight on the Moon 9 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 Earth How Fast Does the Earth Spin? Earth vs The Engineered Where is the North and South Pole? A Guide to Earth’s Lithosphere How To Define the Geosphere Earth Statistics: Straight-Up Stats of Earth How Gravity Sculpted the Earth Earth Age: How Old Is the Earth? Planet Formation and the Core Accretion Theory Earth Tilt: 23.5 Degrees Axis Density of Earth: What is the Earth Made Of? Why Does the Earth Hum? Shape of the Earth: The Oblate Spheroid Chandler Wobble: Why the Earth Wobbles Like a Toy Top What is Earth’s Escape Velocity? Why Do We Have Seasons? Earth Rotation: The Day-Night Boundary Solar System A Visual Guide to Our Solar System [Infographic] What’s the Difference Between Meteors, Meteorites and Meteoroids? Facts About Asteroids and Our Asteroid Belt Mars Atmosphere Compared to Earth Solar System Near Earth Objects (NEO): Are We at Risk of an Impact Collision? Near Earth Objects (NEO) are debris in space at risk colliding with Earth. Asteroids, comets and meteors pose potential risk to Earth.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 Neighbor Supermassive 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 System Universe Expansion: The Farthest Galaxy from Earth [Infographic] The Sun Main Sequence Star: Our Sun’s Thermonuclear Reaction 5 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.