Daily Sky Motions Flashcards
1
Q
What causes daily sky motions?
A
Rotation of the Earth
2
Q
A sphere that holds stars and rotates around the Earth every twenty four hours. It also plots/describes positions of objects in the sky.
A
Celestial Sphere Model
3
Q
Circumpolar Stars
A
Stars that never set; starts that APPEAR to circle around the Earth’s North Pole from the viewer’s point of view.
4
Q
Directly at the North Pole, stars appear to be . . .
A
Circumpolar Stars. (All/Most)
5
Q
Directly at the Equator, stars appear to be . . .
A
Vertical & Cut by the Horizon; No Circumpolar Stars
6
Q
Zenith
A
Point Directly Above Observer
7
Q
Meridian
A
A great circle (imaginary) that passes through the celestial poles and the observer’s zenith.
8
Q
Constellation (modern)
A
A grouping of stars that appear to form a pattern or picture.
