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23 Nov 2019

In astronomy, distances are often expressed in light-years. One light-year is the distance traveled by light in one year. The distance to Alpha Centauri, the closest star other than our own sun that can be seen by the naked eye, is about 4.3 light-years. Express this distance in meters

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Nelly Stracke
Nelly StrackeLv2
30 Aug 2019
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