Scroll over the [ ]'s to reveal the correct answer.
Lab 4: Angles in Astronomy- Parallax
Angular Size
The [Angular Size] is the size of an object measured in angles.
The [True Size] is the actual size of an object.
- S= [True Size] (doesn't change)
- θ= [Angular Size] (does change)
- D= [Distance]
As the distance [Increases], the angular size [Decreases].
To convert to radians (θrad) from degrees:
Parallax
Parallax is the apparent change in position of [Nearby] objects relative to [Background] objects as the observer changes position.
The radius of earth's orbit around the sun is [1 Astronomical Unit].
