Star
Subdwarf
A small, hot star below the main sequence.
Stars slightly less luminous than main-sequence stars of the same temperature — old, metal-poor (sdO/sdB) or extreme horizontal branch.
Overview
Stars slightly less luminous than main-sequence stars of the same temperature — old, metal-poor (sdO/sdB) or extreme horizontal branch.
See also
T Tauri Star
A turbulent young star approaching the main sequence.
Subgiant
A star transitioning off the main sequence.
Substellar Object
Any object below the hydrogen-fusion limit.
Sirius
The brightest star in the night sky.
Polaris
The North Star — the sky's pivot.
Betelgeuse
A doomed red supergiant in Orion.