| A | B |
|---|
| solar flare | bright burst of light on sun lasting less than an hour |
| solar prominance | violent storm on sun in which a loop or whorl fall back onto sun |
| nuclear fusion | process by which stars make energy, hydrogen to helium |
| binary stars | 2 stars revolve around one another |
| 3 types of galaxies | spiral, elliptical, irregular |
| constellations | group of stars that form an image |
| Milky Way | Our Galaxy |
| Spectroscope | instrument used to separate white light |
| hydrogen | most abundant element in stars |
| Red Shift | Stars emit red light because they are moving away |
| Big Bang Theory | Describes the origin of the Universe |
| Quasars | most distant objects in universe;give off radio and x-rays |
| Pulsars | Neutrons stars begin to spin and give off x-rays and radio ways |
| Black dwarf | Final outcome of the sun |
| apparent magnitude | brightness of a star as seen from Earth |
| absolute magnitude | actual brightness of a star |
| H-R diagram | Shows temperature and absolute magnitude of stars |
| Main sequence stars | Most of the stars on the H-R diagram |
| Blue | Color of the hottest stars |
| Red | Color of the coldest stars |
| Corona | Outermost layer of the sun |
| Mercury | The planet with the most extreme temperatures |
| Venus | The planet with the greenhouse effect. |
| Mars | The planet with iron that forms rust. |
| Jupiter | This planet is the largest and has a great Red Spot which is a storm. |
| Saturn | Planet with the greatest number of rings. |
| Uranus | Planet tilted on its side, retrograde rotation. |
| Neptune | Planet at one point in its revolution is furthest planet out in solar system |
| Pluto | Has moon Charon, almost same size as planet |
| Meteoroid | pieces of asteroid, rock that fall to Earth |
| Meteor | light given off by meteroid as it burns up in atmosphere |
| meteorite | when meteoroid hits Earth's surface |
| Comet | icey snowball, originated in Oort cloud, circles sun, tail always points away |
| Revolution | Time it takes for planet to go around sun, year |
| rotation | time it takes planet to spin on axis, day |
