Stellar Classification

Class	Description	Filaments	Planets	Can Support Life
B	Blue Giant	K	Uncommon	Yes
A	Blue Dwarf	K	Uncommon	Yes
F	Yellow Dwarf	K	Very common	Yes
G	Yellow Dwarf	K	Very common	Yes
K	Orange Dwarf	K	Very common	Yes
M	Red Dwarf	K	Very common	Yes
L	Cool Red Dwarf	K (marginal)	Very common	No
T	Cool Brown Dwarf	K (marginal)	Common	No
Y	Sub-brown Dwarf	—	Rare	No
D	White Dwarf	—	Rare	No
E	Neutron Star	K, E	Rare	No
Q	Black Hole	K, Q	Very Rare	No