The 17 Spheres of Earth
How many spheres of Earth exist on Earth? If you count them all, you would get about 17 of them. This is the definitive guide to all 17 spheres of Earth.
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.
100 Earth Facts: The Big List of Facts About Earth
Earth needs no introduction. From its origin to its inevitable future, the story of Earth is greatest story ever told. Get started with this list of 100 Earth facts.
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.
Mars Atmosphere Compared to Earth
Carbon dioxide dominates Mars atmosphere. But Earth is rich in nitrogen and oxygen. Mars has a much thinner atmosphere. In fact, Earth is 100x denser.
Lunar Maria: Volcanic Basins on the Moon
The dark areas on the moon are lunar maria which in Latin means “seas”. They’re called maria because early scientists believed they could see oceans there.
How Big Is the Moon?
How big is the moon? It’s about 1/4 (27%) the size in diameter of Earth. Alternatively, you can think of the moon being about as wide as the United States.
How to Measure the Distance to the Moon
How do we measure the distance between the Earth and the Moon? Astronomers use parallax, lunar eclipses, radar and laser ranging to measure lunar distance.
How Fast Does the Earth Spin? Earth vs The Engineered
How fast does the Earth spin? Earth spins at an incredible 1000 miles per hour (1600 km/hr). We compare the Earth’s spin to nature and engineered velocities
![A Visual Guide to Our Solar System [Infographic]](https://earthhow.com/wp-content/uploads/2018/08/Solar-System-Infographic-425x319.png)
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.
Moon Gravity: Your Weight on the Moon
The gravity of the moon is 1/6 of Earth. If you stepped on a scale on the moon, you could subtract 83.5%. So 100 kg in weight would be 16.5 kg on the moon.
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.
![Supermassive Black Holes: The Center of Galaxies [Infographic]](https://earthhow.com/wp-content/uploads/2019/02/Supermassive-Black-Holes-425x319.png)
Supermassive Black Holes: The Center of Galaxies [Infographic]
All galaxies have supermassive black holes at the center of it. These collapsed stars are a few times the mass of a sun which run out of fuel and explode.
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.
Main Sequence Star: Our Sun’s Thermonuclear Reaction
Our sun is a main sequence star. This just means that it burns hydrogen into helium and goes through this “main sequence” for about 95% of its life span.
