Life as we know it developed on a planet orbiting a G2 V star, the Sun. The cryptic “G2 V” designation is the Sun’s “spectral type.” Based on a star’s spectrum, astronomers group stars by temperature.

113, No. 780, February 2001 A Large Spectral Class Dependence of the... A Large Spectral Class Dependence of the Wilson‐Bappu Effect among Luminous Stars This is the metadata section. Skip to content ...

They are between two and ten times more massive than the sun and have spectral types A, B, and in a few cases F. T Coronae Australis (or T CrA for short) is a Herbig Ae-type star of spectral type ...