10 Types of Forces
A force can make things move, stop, or change direction. For example, types of forces include gravity, friction, and magnetism.
Outer Space
10 Types of Natural Disasters
A natural disaster is a sudden and extreme event caused by nature that can cause damage and harm people. Learn the types of natural disasters.
Electromagnetic Radiation – Explore the EM Spectrum
Electromagnetic radiation is invisible waves of energy that travel through space, including visible light, radio waves, microwaves, and more.
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.
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.
What’s the Difference Between Meteors, Meteorites and Meteoroids?
Their difference is location. Meteoroids are up in the sky. Meteors fall to Earth and flash light breaking down in the atmosphere. Meteorites are on Earth.
Facts About Asteroids and Our Asteroid Belt
Asteroids are odd-shaped rocks made of metal and other elements. There are about 100,000 known asteroids mostly in the asteroid belt between Mars & Jupiter.
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: A Scientific 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.