Stars quiz
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What stops a star from blowing itself apart?
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More questions about Stars
These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.
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About how many stars can you see at once on a dark night?
Answer: A few thousand
Why: The whole sky holds only about 9,000 naked-eye stars, and half of them are always below the horizon.
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How long does Proxima Centauri's light take to reach us?
Answer: About 4 years
Why: Even at Voyager 1's speed of about 17 km per second, the trip there would take over 70,000 years.
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Where was the hydrogen in your body made?
Answer: In the Big Bang
Why: Hydrogen is about 62% of the atoms in your body, so most of your atoms date back to the Big Bang.
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What kind of object is the 'Morning Star'?
Answer: A planet
Why: It is Venus, the brightest natural object in the night sky after the Moon.
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What is a 'failed star' too small to fuse hydrogen called?
Answer: Brown dwarf
Why: Heavier brown dwarfs can still fuse deuterium, a rare heavy form of hydrogen, but only for a while.
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Which element in a massive star's core triggers its collapse?
Answer: Iron
Why: Once the iron core gives way, its outer part falls inward at up to 70,000 km per second, almost a quarter of light speed.
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