Astrophysics (index)about

phase angle

(view angle of reflected light implied by the phase of the Moon)

The phrase phase angle is used to describe the angle between the path of light from a light source to a body, and the path of light from this reflection to the observer. The phrase is used regarding the phase of the Moon, and is also useful for solar system planets as a factor in their apparent magnitude. It is also a factor regarding the light curves of transiting extra-solar planets.


(Moon,Sun,astronomy)
http://en.wikipedia.org/wiki/Phase_angle_(astronomy)

index