Hertzsprung–Russell classifications

A

• Asymptotic-giant-branch stars‎ (4 C, 99 P)

B

• Bright giants‎ (7 C, 2 P)
• Brown dwarfs‎ (3 C, 194 P)

D

• Main-sequence stars‎ (7 C, 3 P)

G

• Giant stars‎ (8 C, 5 P)

H

• Horizontal-branch stars‎ (2 C, 197 P)
• Hypergiants‎ (6 C, 7 P)

P

• Pre-main-sequence stars‎ (2 C, 18 P)

R

• Red dwarfs‎ (2 C, 13 P)

S

• Subdwarfs‎ (4 C, 4 P)
• Subgiant stars‎ (6 C, 5 P)
• Supergiants‎ (9 C, 9 P)

W

• White dwarfs‎ (2 C, 159 P)

• Hertzsprung–Russell diagram
• Astronomy:Stellar classification

B

• Astronomy:Blue loop

H

• Astronomy:Hayashi track
• Astronomy:Henyey track
• Astronomy:Hess diagram

I

• Astronomy:Instability strip

R

• Astronomy:Red-giant branch

S

• Astronomy:Stellar birthline