Topic 7 – Astronomy1 Flashcards
1
Q
Why do the values of gravity on earth and the moon differ?
A
- Their differences in their mass
2
Q
M V E M J S U N
A
- My
- Very
- Educated
- Mother
- Just
- Served
- Us
- Noodles
3
Q
Geocentric
A
- Everything orbits Earth
4
Q
Heliocentric
A
- Everything orbits the Sun
5
Q
What does our solar system consist of?
A
- Sun
- Planets
- Natural satellites
- Dwarf Planets
- Asteroids
- Comets
6
Q
Orbit of Moon
A
- Circular around planets
7
Q
Orbit of Planets
A
- Slightly elliptical around sun
8
Q
Orbit of Comets
A
- Very elliptical around sun
9
Q
Orbit of Artificial Satellites
A
- Circular around any body
10
Q
Explain speeds of circular orbits
A
- Remain unchanged, but velocity is changing, so acceleration is increasing
11
Q
Relationship between orbit speed and radius
A
- Higher orbit speed requires smaller radius
12
Q
Big Bang:
A
- Everything started at one point, and keeps expanding
13
Q
Steady State Theory:
A
- As galaxies move apart, new ones will be formed in the gaps
14
Q
Red shift:
A
- When light waves are stretched, causing wavelengths to appear longer, shifting towards red side of spectrum
15
Q
A
16
Q
Evidence of Big Bang and Steady State Theory
A
Red shift:
- When light waves are stretched due to Galaxies moving away from each other, meaning they all came from one point
17
Q
Evidence of Steady State Theory
A
Red shift:
- When light waves are stretched due to Galaxies moving away from each other, meaning they all came from one point
18
Q
if a wave source is moving relative to an observer, what variable would change?
A
- Frequency and wavelength
19
Q
What dis
A
