Category: Questions
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What is a light-year?
A light-year is a measure of distance – not time (or anything to do with Disney’s Toy Story). It’s used to indicate the distance to stars and galaxies. It’s the distance light travels in one year in a vacuum, which is about: – 4.2465 light-years OR 5.88 trillion miles OR 9.46 trillion kilometres Light travels…
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How far is that star?
Basically, far! The Sun is the closest (and brightest) star. It is about: – 93 million miles – 150 million kilometres The next closest star (Proxima Centauri) is invisible to the unaided human eye and you need to be in the Southern Hemisphere to see it with a telescope (it’s too dim to see with…
Stargazing Guy 