stellar astronomy
astronomy of self-luminous gaseous celestial bodies of great mass whose shape is usually spheroidal and whose size may be as small as the earth or larger than the earth's orbit
en-GB/ˈstɛlə əˈstɹɒnəmɪ/
en-US/ˈstɛlɚ əˈstɹɑnəmi/
astronomy of self-luminous gaseous celestial bodies of great mass whose shape is usually spheroidal and whose size may be as small as the earth or larger than the earth's orbit