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Space Trivia Quiz

Planets, stars and the universe. Choose your difficulty and round in the Space quiz, then explore the explanation and source for every answer.

EasyA relaxed start with familiar facts.MediumThink a little deeper and connect what you know.HardTrust your knowledge and notice the details.
SAMPLES BY DIFFICULTY

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Space questions are supported by cited sources. Review the correct answer and a short explanation after each question.

Easy · SpaceWhich planet is known as the Red Planet?

Mars. Iron minerals on Mars oxidize, giving its surface a reddish appearance.

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Medium · SpaceWhich atmospheric gas gives Uranus its blue-green appearance?

Methane. Methane absorbs red light, making Uranus appear blue-green.

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Hard · SpaceWhy does the Moon always show approximately the same face to Earth?

Its rotation and orbital periods match. The Moon rotates once in the same time it takes to orbit Earth.

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