NORTH POLAR SEQUENCE


Meaning of NORTH POLAR SEQUENCE in English

group of 96 stars near the north celestial pole, used from about 1900 to 1950 as standards of magnitude and colour by which other stars are measured. First proposed by the American astronomer Edward Charles Pickering, the system has been largely superseded by the UBV system (q.v.).

Britannica English vocabulary.      Английский словарь Британика.