4. Motion Of Celestial Objects Flashcards
1
Q
Define space velocity
A
A stars motion through space
2
Q
Define radial velocity
A
The component of a stars space velocity along our line of sight
3
Q
Define proper motion
A
The component of a stars space velocity in the plane of the night sky
4
Q
Approximation needed to call radiation ‘blackbody radiation’
A
The radiation emitted by an object is in thermal equilibrium with its surroundings
