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The Magnetosphere
A magnet is surrounded by a magnetic field, which is the area around a magnet that has magnetic forces. In physics, force is defined as any action that changes the location, shape, …
The Atmosphere
The atmosphere is the part of Earth that contains the air we breathe. It extends 60 miles (97 km) above the surface of Earth and is made up of different gas molecules. (Molecules …
Constellations
A constellation is a group of stars that forms a shape and has been given a name. Different constellations can be seen from the Northern Hemisphere and the Southern Hemisphere. …
What Is Astronomy?
Astronomy is the study of stars and other objects in space. Ancient peoples studied the sky and the movement of stars, the Moon, and the Sun and were able to create calendars based …
Earth's Spheres
Earth itself is sphere-shaped. Earth's spheres are layers surrounding Earth. The geosphere is the part of Earth we live on. The geosphere includes the rocky crust and the mantle …
Earth in Space
Earth is a planet because it is an object in space big enough to have its own gravity, is spherical, and moves around a sun. Earth moves in an almost circular orbit around the Sun. …
Moving Plates
Earth is made up of different layers: crust, mantle, and core. The crust is solid, the mantle is solid on the top and soft below, the core is soft metal on the outside and solid …