"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...

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...

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...

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...

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...

Kenobi, derives from a transliteration of "OB-1". However, Star Wars was first released in 1977, a year before the OB-1, and most sources credit the ARP 2600...

supernovae. The Wolf–Rayet star is in the final phase of its life cycle and is expected to turn into a supernova much sooner than the OB star. It is predicted to...

usually found within 0.3 parsec (60,000 astronomical units) of the massive OB star and the dusty proplyds have tails with a length of 0.1 to 0.2 parsec (20...