Characteristics of Stars IM

Front

What color are the coolest stars?

Back

Red stars are the coolest stars.

Front

As the _________ of a star increases, luminosity increases.

Back

Size. As the size of a star increases, its luminosity also increases.

Front

What unit do astronomers typically use to measure distances to stars?

Back

Light-years. Distances to stars are measured in light-years.

Front

How do scientists determine the composition and temperature of stars?

Back

By analyzing the spectra of the light that stars emit.

Front

What is the difference between apparent brightness and absolute brightness of a star?

Back

Apparent brightness is the brightness of a star as seen from Earth, while absolute brightness is the true brightness of the star.

Front

What is the hottest color of stars?

Back

Blue stars are the hottest.

Front

What is a star's luminosity?

Back

Luminosity is the total amount of energy a star emits per second.

Front

What is the relationship between a star's size and its temperature?

Back

Generally, larger stars are hotter than smaller stars.

Front

What is the electromagnetic spectrum?

Back

The electromagnetic spectrum is the range of all types of light radiation, including visible light, infrared, and ultraviolet.

Front

What is parallax in astronomy?

Back

Parallax is the apparent shift in position of a nearby star against distant background stars as observed from different positions of Earth.