Astronomical Distance Units

Astronomical Distance Units - 1 l.y = 10,000,000,000,000 km...

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Astronomical Distance Units: an “a.u.” = mean distance between Earth and Sun a light-year = distance light travels in 1 year (=67,000 a.u.)
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Unformatted text preview: 1 l.y. = 10,000,000,000,000 km = 10 13 km = 10 trillion km A solar system (one of many) Relative sizes: Some Other Solar Systems (over 250 known)...
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