Topic 1: Frames of Reference and Ancient Views Flashcards
1
Q
Earth Centered Model (Geocentric)
A
- Earth is stationary center of universe
- All celestial bodies revolve around Earth
- Ancient people believed this because they did not think about frame of reference
2
Q
Sun Centered Model (heliocentric)
A
- Sun is stationary centre of solar system
- All celestial bodies remove around sun
- Nicholas Copernicus
3
Q
Constellations
A
- Unchanging pattern of stars in the sky
- Looks like objects
4
Q
How do you tell a stars position in the sky?
A
Altitude-azimuth co-ordinates
- Azimuth
- compass directions
- start at 0 and go clockwise to 360
Altitude
- How high the star is in the sky
- Ranges from 0 at the horizon to 90 straight up
5
Q
Zenith
A
- Highest point directly overhead
6
Q
Celestial Bodies
A
- Sun, moon stars and planets
