"spectrum of OB" refers to "unknown, but belonging to an OB association so thus of early type".[dubious – discuss] O-type main-sequence star B-type main-sequence...

Look up OB or ob- in Wiktionary, the free dictionary. OB, O.B., or Ob may refer to: Ob, a fictional currency in The Great Explosion Sam "O.B." O'Brien...

A subdwarf O star (sdO) is a type of hot, but low-mass star. O-type subdwarfs are much dimmer than regular O-type main-sequence stars, but with a brightness...

roughly one to fifteen million years, depending on the mass of the star. As a result, OB associations are generally only a few million years in age or less...

January 2015. lusvig. "Vad står o:et för i er förkortning?". imgur (in Swedish). Retrieved 18 September 2016. ...men eftersom ÖB står för Överbefälhavare inom...

[ˈoˀðn̩sə ˈpʌlˀtkʰlup]; also known as Odense BK or the more commonly used OB) is a Danish professional football club based in the city of Odense, in southern...

compact dwarf galaxy An early-type main-sequence star B-type main-sequence star O-type main sequence star OB star Blue dwarf (red-dwarf stage), a hypothetical...

had their atmospheres blasted away by radiation from a nearby massive OB star. An alternative concept is that they formed closer to the Sun, where the...

were formed in OB associations. O-class stars are short-lived, and will expire as supernovae after roughly one million years. As a result, OB associations...

A star is a luminous spheroid of plasma held together by self-gravity. The nearest star to Earth is the Sun. Many other stars are visible to the naked...