Skip to content
EarthHow Logo
  • About
  • TopicsExpand
    • Atmosphere
    • Career
    • Geology
    • Life Science
    • Outer Space
    • Water Science
Guides
EarthHow Logo

Outer Space

The 17 Spheres of Earth
Outer Space | Properties of Earth

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.

Read MoreContinue

Earth’s Doppelgängers: A List of Earth Like Planets
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.

Read MoreContinue

100 Earth Facts: The Big List of Facts About Earth
Outer Space | Properties of Earth

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.

Read MoreContinue

What Color Is the Moon?
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.

Read MoreContinue

Mars Atmosphere Compared to Earth
Outer Space | Solar System

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.

Read MoreContinue

Lunar Maria: Volcanic Basins on the Moon
Moon | Outer Space

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.

Read MoreContinue

How Big Is the Moon?
Moon | Outer Space

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.

Read MoreContinue

How to Measure the Distance to the Moon
Moon | Outer Space

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.

Read MoreContinue

How Fast Does the Earth Spin? Earth vs The Engineered
Outer Space | Properties of Earth

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

Read MoreContinue

A Visual Guide to Our Solar System [Infographic]
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.

Read MoreContinue

Moon Gravity: Your Weight on the Moon
Moon | Outer Space

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.

Read MoreContinue

Near Earth Objects (NEO): Are We at Risk of an Impact Collision?
Outer Space | 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.

Read MoreContinue

Supermassive Black Holes: The Center of Galaxies [Infographic]
Outer Space | Stars, Galaxies and Universe

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.

Read MoreContinue

Solar Radiation: How Sunlight Heats the Planet
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.

Read MoreContinue

Main Sequence Star: Our Sun’s Thermonuclear Reaction
Outer Space | Sun

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.

Read MoreContinue

Page navigation

1 2 3 4 Next
  • About
  • Articles
  • Contact
  • How To Cite
  • Privacy Policy
  • Terms of Service

© 2021 Earth How

css.php
  • Geology
  • Outer Space
  • Atmosphere
  • Life Science
  • Career
  • Water Science
Search