Topic 3: Stars, Galaxies and Cosmology Flashcards
1
Q
In what direction does the scale for apparent magnitude go?
A
High magnitude = dim object
Low magnitude or even negative = bright objects
2
Q
What can the luminosity of a star be used to give an indication of how far away it is?
A
It’s distance from earth using an inverse square law
3
Q
What can absolute magnitude be used to calculate?
A
The distance a star is from us.
4
Q
What does the scale of absolute magnitude do?
A
It is the opposite to apparent magnitude. Low values are dim and higher values are bright.
5
Q
Properties of Red Giants:
A
Large, cool and bright.
6
Q
Properties of supergiants:
A
They are very large
7
Q
Properties of white dwarfs@
A
Small, dim but very hot
