Mercury is the smallest planet in our solar system. It is the closest to the Sun and has extreme temperature changes between day and night. Tap to read in detail.

That strange planet is right next door and is called Mercury. Mercury travels around the Sun faster than any other object in the solar system, completing a full orbit every 88 days. It is very ...

In 1781, German-born British astronomer William Herschel made Uranus the first planet discovered with the aid of a telescope.

Get all the news you need in your inbox each morning. Jupiter is the biggest planet in our solar system, according to NASA. The planet is what’s known as a gas giant, which means it doesn’t ...

Our solar system used to have nine planets. Astronomer Mike Brown ... towards the edge of what’s possible with the absolute largest telescopes in the world right now.” Other searches, such ...

Jupiter is the biggest planet in our solar system, according to NASA. The planet is what’s known as a gas giant, which means it doesn’t have a solid surface — though it may have a solid core about the ...