Solar astronomy

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Solar astronomy is stellar astronomy of the Sun.

A major branch of Solar astronomy is Solar physics.

Sun size relative to its distance from Proxima Centauri[edit]

The diameter of the Sun is about 1,390,000 km, and its nearest neighboring star, Proxima Centauri, is 4.22 light years (3.99 x 1013 km) away. Therefore, the ratio of distance to diameter is 28,700,000 : 1, so if the Sun were one centimeter in diameter, Proxima Centauri would be 287 km away.[1]

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