Download Tutorial: Motion

Astronomy 1020-H
Stellar Astronomy
Spring_2016
Day-7
Course Announcements
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SW-2 … hop to it.
1st set of Dark Sky observing nights:
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Mon. Feb. 8 – 7:30pm at the observatory.
Tues. Feb. 9 is the weather backup if both are cancelled.
Del Square Psi meeting – 5:30pm B310 – Wed. 2/3
Earth’s rotation causes the Sun, Planets,
Moon and stars to appear to move when
viewed from Earth
Photo: Dr. Spencer Buckner
Rotation
Celestial Sphere Rotation
Celestial Sphere Rotation
Star B
Star B
2
2
Star A
Star
A2
1
North Star
1
Celestial Sphere
2
3
3
1
1
4
4
3
3
Earth’s Equator
4
4
Celestial Sphere
Rotation
Celestial Sphere
Rotation
Figure 1
Figure 2
Horizon
Rotation
Celestial Sphere Rotation
Celestial Sphere Rotation
Star B
Star B
2
2
Star A
Star
A2
1
North Star
1
Celestial Sphere
2
3
3
1
1
4
4
3
3
Earth’s Equator
4
4
Celestial Sphere
Rotation
Celestial Sphere
Rotation
Figure 1
Figure 2
Horizon
Tutorial: Motion – pg.3
 Work with a partner
 Read the instructions and questions carefully
 Talk to each other and discuss your answers with each
another
 Come to a consensus answer you both agree on
 If you get stuck or are not sure of your answer ask
another group
 If you get really stuck or don’t understand what the
Lecture Tutorial is asking as one of us for help
How long did it
take to get this
picture?
Why does the sky change with
your location?
As you move away from the pole your horizon moves with you but the
locations of the celestial poles and celestial equator remains the same
Why does the sky change over
the course of a year?
As we orbit the sun the direction opposite the sun changes and we only see
the stars when the sun is not up