Luminosity Law
In 1922, Hubble published the result of his investigations on bright nebulae. One part of this work is the Hubble luminosity law for reflection nebulae which make a relationship between the angular size (R) of the nebula and the apparent magnitude (m) of the associated star:
- 5 log(R) = -m + k
where k is a constant that depends on the sensitivity of the measurement.
Read more about this topic: Reflection Nebula
Famous quotes containing the word law:
“The greatest step forward would be to see that everything factual is already theory. The blueness of the sky reveals the basic law of chromatics. Don’t look for anything behind the phenomena, they themselves are the doctrine.”
—Johann Wolfgang Von Goethe (1749–1832)