* Atmosphere: A layer of gases, primarily nitrogen and oxygen, that envelops the Earth and protects it from harmful radiation and meteoroids.

* Magnetosphere: A magnetic field that surrounds the Earth, generated by the movement of molten iron in the Earth's core. It deflects charged particles from the Sun, protecting us from solar wind.

* Space: The vast expanse beyond the Earth's atmosphere, containing stars, planets, galaxies, and other celestial objects.

Let me know if you would like more details about any of these!