Stars described by this adjective can be formed when a nearby giant strips away its outer layers; those subdwarfs are probably responsible for the UV-upturn of seemingly dead elliptical galaxies.
Stars described by this adjective can be formed when a nearby giant strips away its outer layers; those subdwarfs are probably responsible for the UV-upturn of seemingly dead elliptical galaxies. Theoretically, after trillions of years, dwarfs will burn all their hydrogen and briefly be named for this adjective. One type of object named for this property is most likely formed by the collision of main-sequence stars. When plotted on an HR diagram, those objects appear to have missed the turnoff point taken by nearby stars. S Doradus lends its name to a class of luminous variables named for this property that includes P Cygni and Eta Carinae. Massive stars become this color again in a namesake loop. Supergiants of this color sometimes become Wolf-Rayet stars and include Rigel, while globular clusters are home to its namesake stragglers. For 10 points, what color are stars on the left side of the Hertzsprung-Russell diagram, like the O type, which are very hot?
Stars described by this adjective can be formed when a nearby giant strips away its outer layers; those subdwarfs are probably responsible for the UV-upturn of seemingly dead elliptical galaxies.
blue [accept  blue followed by just about any noun, such as subdwarf/straggler/variable]