| Term | Definition |
|---|
| electromagnetic spectrum | the spectrum of energy that travels through the universe in waves |
| telescope | a device to make objects appear closer |
| visible light | the light we see with our eyes |
| colors of visible light | ROY G BIV |
| types of electromagnetic radiation | RMIVUXG |
| radio waves | longest waves, carry communications |
| micro waves | speed up atoms, detect weather |
| infrared waves | heat waves |
| ultra violet waves | cause skin cancer and eye damage |
| wavelength | the distance between the crests of sucessive waves |
| frequency | the number of waves that pass a still point in an amount of time |
| x waves | see through skin |
| gamma waves | shortest waves, used to treat cancer |
| telescope functions | brighten, see detail, magnify |
| reflecting telescopes | use mirrors |
| refracting telescopes | use convex lenses |
| most common large telescopes | reflecting telescopes |
| radio telescopes | teach us how the universe formed |
| microwave telescopes | teach us about the big bang |
| infrared telescopes | teach us about very cold objects |
| ultra violet telescopes | teach us about the sun |
| optical telescopes | teach us the conposition and lifecycle of stars |
| x ray telecopes | teach us about very supernovas and black holes |
| space probes | teach us about objects in our solar system |
| ground telescopes | radio, reflecting, refracting |
| space telescopes | infrared, x ray, ultra violet, gamma ray |
| brightness of stars | depends on size and temperature |
| spectral class | temperature of stars, OBAFGKM |
| apparent brightness | how bright objects seem from here on Earth |
| absolute brightness | how bright objects would be if they were all the same distance from Earth |
| parallax | when stationary objects appear to move because you are moving |
| using parallax | used to calculate the distance to stars |
| HR Diagram | classifys stars by temperature and absolute brightness |
| main sequence stars | stars that are in the main part of their lifecyle |
| supergiant | when big stars expand as they die |
| red giant | when small stars expand as they die |
| supernova | when big stars explode as they die |
| planetary nebula | when small stars explode as they die |
| nebula | cloud of gas and dust where stars are born |
| white dwarf | when small stars collapse as they die |
| black hole | when big stars collapse as they die |
| force that holds stars together | gravity |
| state of matter of stars | plasma |
| source of stars energy | nuclear fusion |
| composition of the sun | hydrogen and helium |
| nuclear fusion | fusing of atoms into new atoms, releases energy |
| age of sun | 4.6 billion years |
| life of stars | small stars burn slower and longer |
Combine with other sets
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