Deck 64: Variable Stars

Question 1

Cepheid's have pulsation periods in the range of _____.

A) 1-700 hours
B) 1-70 days
C) 1-70 minutes
D) 1-70 hours

Answer 1

1-70 days

Question 2

Mira variable stars change their brightness by

A) carbon fusion.
B) hydrogen fusion.
C) molecules in cool atmosphere.
D) PP reaction.

Answer 2

molecules in cool atmosphere.

Question 3

We use this to help measure the distance to variable stars:

A) period-mass
B) period-size
C) period luminosity
D) mass-distance

Answer 3

period luminosity

Question 4

The layer in a variable that star that is responsible for alternately absorbing and releasing the energy flowing from the center of the star is made up of

A) fusing hydrogen.
B) molecules of metal oxides.
C) fusing helium.
D) partially ionized helium.

Question 5

A narrow area above the main sequence where variable stars exist is called the _______.

Question 6

A large explosion of a star is known as a _______.

Question 7

Mira variables have a period of about a day.

Question 8

Using the period of bright stars and the standard candle formula you can measure distances to galaxies at the edge of the universe.