astrophysics Flashcards
1
Q
characteristics of a comet
A
- orbit stars
- comet tails point away from the star
- comet orbits are very elliptical
2
Q
characteristics of a planet
A
- mildly elliptical/circular orbit
- orbit stars
- constant orbital speed
3
Q
what is a satellite
A
anything that orbits a planet (artificial or natural)
4
Q
how does gravitational field strength vary
A
according to mass and radius
5
Q
temperature of blue stars - O
A
> 30,000K
6
Q
temp of deep blue white stars - B
A
10,000-30,000K
7
Q
temp of blue white stars - A
A
7500-10,000K
8
Q
temp of white stars - F
A
6000-7500K
9
Q
temp of yellowish white stars - G
A
5200-6000K
10
Q
temp of pale yellow orange stars - K
A
3700-5200K
11
Q
temp of light orange red stars - M
A
2400-3700K
12
Q
how do stars begin their life
A
nebula
13
Q
second stage of star lifecycle
A
main sequence star - how most of its life is lived
14
Q
third stage of star lifecycle
A
red giant or red super giant
15
Q
what do less massive stars become (4th stage)
A
white dwarves
