(3) Proxima Centauri
(4) Alpha Centauri
Correct Answer : (3) The second nearest star to the Earth after the Sun is Proxima Centauri.
Proxima Centauri is a red dwarf star about 4.24 light-years distant inside the G-cloud in the constellation of Centaurus. It is the second nearest star to the Earth after the Sun.
It was discovered in 1915 by Robert Innes, the Director of the Union Observatory in South Africa, and is the nearest known star to the Sun.
Its diameter is about one-seventh of that of the Sun. Proxima Centauri’s mass is about an eighth of the Sun’s, and its average density is about 40 times that of the Sun. The nearest star to the Earth is the Sun.
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