Astronomical giant with a spectral letter ranking

• Relatively cool heavenly body
• Astronomer's cool giant
• Chi Cygni, for one
• Spectral type
• Comparatively cool red giant
• Celestial red giant
• Certain astronomical classification
• Celestial cool red giant

Wikipedia Word definitions in Wikipedia
SSTAR may refer to: Society for Sex Therapy and Research Small, sealed, transportable, autonomous reactor