Why is the sun brighter then other stars. Flashcards
1
Q
What makes the sun produce light?
A
Heat
( Energy, Nuclear Fusion.)
2
Q
What happens to a star’s light as it moves through space?
A
A star’s light appears brighter closer to the star and dimmer further away because the light spreads out.
.
3
Q
What is a light year?
A
Distances between the sun and other stars are measured in units .
A light year is a large unit.
4
Q
What is apparent brightness?
A
How bright a star looks from earth
5
Q
Why is the sun brighter than other stars?
A
Because it is the closest to earth.
6
Q
What three factors affect apparent brightness?
A
Size (Brighter when its bigger)
Temperature (Brighter when it is hotter)
Distance (Brighter when it is closer)
