Stars Flashcards
1
Q
What magnitudes of stars can be seen by the naked eye?
A
Magnitudes 1-6
2
Q
What do emission lines do hot stars show?
Cooler stars?
A
Hot- hydrogen/helium
Cool neither of those
3
Q
How many stars follow the main sequence on the hertzspring russel diagram?
A
90%
4
Q
What are some characteristics of white dwarfs
A
Very hot small and dim
5
Q
What are the granola regions of stars?
A
- main sequence
- white dwarves
- giants
- super giants
6
Q
What does the position of a star on the H-R diagram depend on?
A
Mass, composition and stage of evolution
7
Q
What does the lifetime of a star depend on?
A
Mass
8
Q
What can we determine from measurements?
A
Mass relates to radius and luminosity.
9
Q
Which relationship only apples on the main sequence?
A
Luminosity and mass
10
Q
What happened when the fuel in a stars core runs out?
A
It cools and collapses due to gravity
