measurements and star properties

Question 1

AU

Answer 1

astronomical unit the distance between earth and the sun

Question 2

the distance between earth and the sun is…

Answer 2

150,000,000kms

Question 3

1 light year in AU=

Answer 3

63,241 AU

Question 4

parsec

Answer 4

a unit of measurement based on parallax and trigonometry

Question 5

1 parsec in light years

Answer 5

3.26 light years

Question 6

how far is the closest star on earth and which star is it

Answer 6

proxima centauri and 4.22 light years away

Question 7

observable features in a star to understand their life cycle…

Answer 7

brightness, color, temperature, mass, and composition

Question 8

luminosity

Answer 8

measure of the total amount of energy a star gives off per second

Question 9

what does the colour of a star indicate?

Answer 9

the stars surface temperature

Question 10

lower temperature stars are

Answer 10

red

Question 11

middle range stars are

Answer 11

yellow

Question 12

high temperature stars are

Answer 12

blue

Question 13

binary system

Answer 13

when 2 stars orbit around each other

Question 14

how can scientists determine the compositions of stars?

Answer 14

by measuring the wavelengths of EMR that are emitted from the star using a spectroscope