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Are all stars at different lengths or are some stars at the same distance?
Question Date: 2020-04-07
Answer 1:

Many of the stars we see are at different distances from us, but some are, in fact, the same distance away. For example, two stars in the Alpha Centauri solar system, Alpha Centauri A and B, are both 4.4 ligh-years away from us. If we're looking for stars that are about the same distance away but not in the same direction, then we see that some stars in the Sirius system (Big Bear constellation) and some stars in the Gliese 65 system are all about 8.4 to 8.6 light-years away from us, even though stars in the Sirius system are not in the same area as the stars in the Gliese system!

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