Advertisement Upgrade to remove ads

photosphere

The visible surface of the sun

solar prominance

A bright loop in the Sun's corona

corona

The sun's atmosphere

sunspot

A dark spot on the photosphere of the sun

radiation zone

Energy from the star moves out through this zone

core

Most of the Sun's mass is in this layer

solar flare

A brief burst of energy from the sun's photosphere

solar wind

A fast-moving stream of particles thrown into space by solar flares

convection zone

In this zone, cooler particles are pulled down by gravity

fusion

The combining of hydrogen particles

granules

Hot bright areas, gives a grain look to the surface of the Sun

galaxy

Group of stars, gas and dust

light-year

Distance light travels in one year

main-sequence

Most common type of star

universe

Everything that exists

apparent magnitude

How bright a star appears to be

absolute magnitude

The actual brightness of the star

spiral galaxy

Arms of the galaxy contain young stars, protostars, dust and gas

barred galaxy

it is similar to a spiral galaxy but the spiral extends from a bar of stars that stretches from the center

elliptical galaxy

They range from almost spherical like a baseball to to a shape like a flattened football they do not seem to rotate

irregular galaxy

Group of stars with not obvious shape

white dwarf

The star continues to shine dimly for billions of years as it slowly cools

red giant

The star may expand to 100 times its former size.

nebula

A star begins within a huge cloud of hydrogen, helium, and tiney particles of dust

protostar

After millions of years, the particles begin to squeeze together, attracted to each other by gravity. As it grows in mass, its temperature rises until it begins to glow

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set