Surface Brightness
The overall brightness of an extended astronomical object such as a galaxy, star cluster, or nebula, can be measured by its total magnitude, integrated magnitude or integrated visual magnitude; a related concept is surface brightness, which specifies the brightness of a standard-sized piece of an extended object.
Read more about Surface Brightness: General Description, Calculating Surface Brightness, Relationship To Physical Units
Famous quotes containing the words surface and/or brightness:
“In Manhattan, every flat surface is a potential stage and every inattentive waiter an unemployed, possibly unemployable, actor.”
—Quentin Crisp (b. 1908)
“on thy brow
Shall sit a nobler grace than now.
Deep in the brightness of the skies
The thronging years in glory rise.
And, as they fleet,
Drop strength and riches at thy feet.”
—William Cullen Bryant (1794–1878)