Meet You Neighbors

This is a Hubble image of the two bright stars in Alpha Centuari, the nearest star system to the Solar System. The system has a third member, a dim red dwarf not shown in this picture.

Alpha Centauri A and B are Sun-like stars. A (on the left) has 1.1 times the mass and 1.5 times the luminosity of the Sun. B is smaller and cooler, with 0.9 times the Sun’s mass and less than 0.5 times its luminosity. Alpha Centuari C, the red dwarf is the closest member of the system to us. It’s often called Proxima Centuari.

Image Credit: NASA

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