Quiz 4 Flashcards
1
Q
Which spectral type of star is the most common?
A
Type M.
2
Q
What is the most common way to determine the masses of stars?
A
Observe the motions of binary star systems.
3
Q
How does the size of the Sun compare to the average size of stars?
A
It is of average size.
4
Q
The H-R diagram plots what two aspects of stars?
A
Luminosity and spectral type (temperature).
5
Q
What are three units used in astronomy to measure distance?
A
- Parsec
- Light year
- Astronomical Unit (AU)
6
Q
The most direct method to determine the distance to the stars is:
A
Parallax
7
Q
Cepheid Variable stars are used to:
A
Measure galactic distances.
8
Q
What are three luminosity classes?
A
- Giant
- Subgiant
- Main Sequence
9
Q
Who discovered the Period-Luminosity Relation?
A
Henerita Levitt
10
Q
How does the period of RR Lyrae stars compare to that of Cepheid Variable stars?
A
RR Lyrae stars have shorter periods.
