Star Systems and Galaxies Answers

3 verified answers

Which statement describes absolute and apparent brightness?

Absolute brightness and apparent brightness are identical ways to describe the brightness of a star.

Absolute brightness and apparent brightness change with the distance from the star to the observer.

Absolute brightness depends on the distance from the star to the observer, whereas apparent brightness is always the same.

Absolute brightness is the actual amount of light produced by the star, whereas apparent brightness changes with distance from the observer.

A light-year is a measurement of .

time

distance

mass

speed

The distance between stars is measured in light-years rather than in miles or kilometers because the distance between stars .

is very small

is very large

cannot be measured

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