CC 26 Stars

Their distance from Earth.

Their brightness.

Their chemical composition.

Their age.

To take long-exposure photographs of faint objects.

To divide incoming light from an object into individual colors or wavelengths.

To measure the distance of stars from Earth.

To determine the speed at which stars are moving.

M

G

O

A

Green light is scattered away by Earth's atmosphere.

Our eyes mix all the emitted colors together, resulting in white light.

Stars only emit green light in the infrared spectrum, which is invisible.

Green stars are too far away to be seen with the naked eye.

Its apparent brightness as seen from Earth

The actual total energy it gives off per unit time

Its distance from Earth

Its surface temperature

Its size and its distance from Earth

Its temperature and its age

Its size and its temperature

Its mass and its color

Surface Temperature

Star's Mass

Luminosity

Star's Age

They are expanding into red giants

They are fusing hydrogen into helium in their cores

They are collapsing into white dwarfs

They are exploding as supernovas

Hot, blue-white, and very luminous

Cool, red, and very large

Hot, blue-white, and very faint

Cool, red, and very faint

Luminous, cool, and huge

Faint, hot, and small

Luminous, hot, and small

Faint, cool, and huge