Astron.
the magnitude of a star derived either from the total energy that it radiates at all wavelengths or from the total energy of those of its wavelengths that are received on earth.
Astron.
the magnitude of a star derived either from the total energy that it radiates at all wavelengths or from the total energy of those of its wavelengths that are received on earth.
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012