2. Section 2 Characteristics of stars By Antonia James, Hannah Rohrborn, Jada Staples

3. Characteristics used to classify stars include color, temperature,size, composition, and brightness A stars absolute brightness is if it was the standard distance from the earth. temperature is based on the color of the star Blue or blue white is the hottest and red is the coolest

4. The brightness of a star depends upon both its size and atmosphere. It depends on the size of the star and the stars temperature.

5. Astronomers use a unit called the light-year to measure between the stars. The distance of a light year is 9.5 million million kilometers remember that a light year is a unit of distance not time

6. Astronomers often use parallax to measure distance to a nearby stars. The apparent movement when seen from a different position of a star

8. The End