ASTRONOMY CH 4 Stars, Galaxies & the Universe

20 terms by jvaught 

Create a new folder

Advertisement Upgrade to remove ads

constellation

A group of stars that form a pattern in the sky

spectrograph

an instrument that separates light into colors and makes an image of the resulting spectrum

apparent brightness

the brightness of a star as seen from earth

absolute brightness

the brightness a star would have if it were at a standard distance from earth

light year

The distance that light travels in one year

parallax

the apparent change in position of an object when seen from different places

nebula

a huge cloud of dust and gas in space

protostar

a contracting cloud of gas and dust; the earliest stage of a star's life

white dwarf

a faint star of enormous density

super nova

a star that suddenly gets very bright and explodes

neutron star

a star that has collapsed under its own gravity

black hole

a region of space resulting from the collapse of a star

binary star

a system of two stars that revolve around each other under their mutual gravitation

galaxy

(astronomy) a collection of star systems

quasar

a starlike object that may send out radio waves and other forms of energy

scientific notation

a method of writing very large or very small numbers by using powers of 10

big bang

the initial explosion that resulted in the formation and expansion of the universe

Hubble's Law

The observation that the farther away a galaxy is, the faster it is moving away.

universe

All matter and energy that exists in space

pulsar

a rapidly spinning neutron star that produces radio waves

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