Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Brechbill ch 13
Stars and Galaxies Vocab
| Term | Definition |
|---|---|
| chromosphere | layer of the sun's atmosphere above the photosphere; color |
| Polaris | the north star |
| Proxima Centauri | next closest star to earth after the sun |
| Sirius | brightest star in the night sky |
| circumpolar | stars and constellations that seem to go around Polaris |
| constellation | group of stars that form a pattern in the sky |
| apparent magnitude | measure of the amount of light received by earth from a star; how bright it looks |
| absolute magnitude | measure of the amount of light a star actually gives off; as if they were all the same distance away |
| nebula | spinning cloud of dust and gas; the birth place of stars |
| black hole | final stage of a massive star; gravity is so strong, not even light can escape |
| light year | unit representing how far light travels in one year; used to record astronomical distances |
| white dwarf | late stage of a low mass or main sequence star; outer layers escape leaving behind a HOT, DENSE CORE |
| super giant | late stage of a massive star; stars core heats up and expands, leading to a supernova |
| Red Shift | proves that stars and galaxies are moving away from earth because the wavelengths of light are stretched to the red end of the spectrum |
| Big Bang Theory | states that 13.7 billion years ago, the universe began with a huge fiery explosion. |
| galaxy | large group of stars, dust, and gasses held together by gravity; elliptical, spiral, or irregular |
| neutron star | collapsed core of a supernova that contains only neutrons in its dense core |
| red giant | late stage of a low mass or main sequence star; outer layers expand and cool; late stage of the sun |
| main sequence | 90% of stars that are burning the hydrogen in their core; middle-aged stars; diagonal band on the HR diagram |
| convection zone | circulation of gases in an area inside the sun |
| photosphere | lowest layer of the sun's atmosphere; sometimes referred to as the surface of the sun; gives of LIGHT |
| corona | outermost, largest layer of the sun's atmosphere; can be seen during a total solar eclipse |
| sunspot | areas on the surface of the sun that are cooler and less bright. |
Created by:
brechbillc
Popular Science sets