Space Quiz
Planets, stars and historic missions. Twenty questions, and no hand-waving allowed.
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About this test
Astronomy is the only science where you are always looking at the past. Look at the Sun and you see it as it was eight minutes earlier; look at Proxima Centauri, our nearest star, and you see it as it was over four years ago. No image of the sky is ever an image of the present, and that lag is what makes the exercise vertiginous rather than merely pretty.
The most instructive counter-example in the Solar System is Venus. Mercury is far closer to the Sun, yet Venus holds the surface temperature record at around 460 °C, hot enough to melt lead. The reason is not distance but atmosphere: an extraordinarily dense layer of carbon dioxide traps heat in a runaway greenhouse effect, while airless Mercury dumps its heat the moment night falls.
One reflex is enough to improve: every time you meet an astronomical number, ask whether it is a distance, a duration or a mass. The light-year is a distance, so is the astronomical unit, so is the parsec. A good share of wrong answers in astronomy quizzes are not memory gaps but category confusions.
How it works
Twenty questions with four options each, running from the most accessible to the most technical, with exactly one correct answer every time. Your score is the percentage you got right, and the full breakdown appears at the end.
This test is provided for entertainment purposes only. It is not a diagnosis or professional advice.