Classification of stars

Question 1

What is apparent magnitude?

Answer 1

how bright the star appears from
Earth

Question 2

What is absolute magnitude?

Answer 2

how bright the star would appear if it
was 10 parsecs from Earth.

Question 3

What is the Hipparcus Scale?

Answer 3

classifies astronomical objects by their apparent magnitudes, with the
brightest stars given an apparent magnitude of 1, and the faintest visible stars being given an
apparent magnitude of 6.

Question 4

Define Parsec

Answer 4

The distance to an object that subtends an angle of 1 arc second.

Question 5

Define light year

Answer 5

The distance travelled by light in a vacuum in 1 year

Question 6

Define 1 AU

Answer 6

The mean distance between the earth and the sun

Question 7

Luminosity

Answer 7

The total power output of radiation emitted by a star

Question 8

Intensity

Answer 8

power received from a star (its luminosity) per unit area

Question 9

What does the intensity of a star follow?

Answer 9

inverse square law, meaning it is inversely proportional
to the square of the distance from the star

Question 10

Parallax

Answer 10

the apparent change of position of a nearer star in comparison to distant stars