Astronomers study distant stars and planets by using telescopes to observe them. Telescopes can be ground-based or placed in space to capture light and images from faraway objects. They analyze the light, colors, and other signals received to learn about ...

Natural satellites are objects that orbit planets, and they are not made by humans. The Moon is an example of a natural satellite, as it orbits the Earth. Natural satellites can vary in size and shape, and they are held ...

Planetary rings are made up of countless small particles of ice, rock, and dust that orbit around the planet. These particles can range in size from tiny grains to large chunks several meters across. Rings are held in place by ...

Gas giants are large planets made mostly of gases like hydrogen and helium, with very small rocky cores. In our Solar System, the gas giants are Jupiter, Saturn, Uranus, and Neptune. These planets don’t have solid surfaces like Earth; instead, ...

The Earth is called the “Blue Planet” because it looks blue from space. This is due to the large amount of water in its oceans, which covers most of its surface. The green and brown areas represent land, and the ...