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jerryjerry
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The closest star to our Sun would be one of the three in the Alpha Centauri system. The system is only 4.27 light years from the Sun. Alpha Centauri A is the primary in the system. It is slightly larger than our Sun. It has a similar yellowish color with a stellar classification of spectral type G2 V. It also rotates every 22 days compared to 25 for the Sun. The secondary, Alpha Centauri B, is slightly smaller and has a spectral type of K1 V. It is orangish-yellow compared to the primary. It is 90% as massive as our Sun and about 14% smaller in radius. It rotates every 41 days. The third in the system is called Proxima Centauri. It would technically, be the closest single star to our Sun at 4.22 light years.