Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account

The sun is a_.

main-sequence star

What is the next stage in the sun's life cycle?

red giant

What will be the final stage in the sun's life cycle?

black dwarf

Light cannot escape the intense gravitational pull of a_.

black hole

Our galaxy is called the_.

Milky Way

At its nucleus, the Milky Way Galaxy is about 100,000 light-years wide and_.

10,000 light-years thick

Where is our sun located in the Milky Way?

within one of the spiral arms

About 60 percent of all known galaxies are classified as_.

elliptical galaxies

According to Hubble's law, galaxies are retreating at a speed that is proportional to their_.


Which of the following indicates that the universe is expanding?

red shift of distant galaxies

Based on the observed red shifts in the spectral lines of distant galaxies, astronomers conclude that_.

the universe is expanding

Greater red shifts in the spectra of galaxies indicate_.

faster speeds

According to the big bang theory, the universe began about_.

13.7 billion years ago

Patterns of stars are called what?


The most basic way to measure the distance to a star_.


Which factors determine a star's apparent magnitude?

size, tempature, distance

What are the two main types of bright nebulae?

emission nebula, and reflection nebula

What happens to a low mass star when it depletes its hydrogen fuel?

it collapses into a white dwarf

What is a galaxy?

a group os stars,dust, and gases held together by gravity

Describe each step of the sun's life cycle.

red giant, planetary nebula, white dwarf, black dwarf

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 and try again


Reload the page to try again!


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

Voice Recording