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Astronomy Review
| Question | Answer |
|---|---|
| Rotation | spinning on own axis, causes day and night |
| Revolution | an object revolving around another object, example moon around earth |
| What are the most common elements in the universe? | helium and hydrogen |
| Light year | the distance light travels in a year (5.88 trillion miles) |
| what are the parts of a comet? | nucleus, coma, tail |
| Which direction does the tail of a comet point? | away from the sun |
| What causes the tail of a comet? | gas and dust pushed away from the comet (solar wind) |
| Absolute Magnitude | how bright the star is from a standard distance |
| Nebula | huge cloud of dust and gas held together by gravity |
| Main Sequence | 90% of stars are in this stage of the life cycle |
| Red Giant | the stage after main sequence for small-medium mass stars |
| Red supergiant | a star that is among the most massive and brightest of all stars |
| Supernova | extremely bright explosion of a star |
| black dwarf | a dead star that no longer gives of heat or light |
| Black hole | a gravitational field so strong that no light can escape |
| What causes stars to have different life cycles? | life cycle of a star based on mass |
| A protostar must start what process to be considered a star? | nuclear fusion |
| Milky Way | spiral shaped galaxy we live in |
| Elliptical | smooth circular or oval shaped galaxy (1/3 of all galaxies) |
| Spiral | flat disk-shaped galaxy (Most abundant type of galaxy) |
| irregular | random scattered type of galaxy |
| what is at the center of our galaxy? | black hole |
| Photosphere | surface of the sun |
| corona | 3rd and hottest layer of the sun |
| Solar wind | carries particles out from sun |
| sunspot | coolest, dark spot located on the sun |
| Source of Sun's energy? | nuclear fusion |
| Apparent magnitude | how bright the star is from the sun |
| Waxing | light is getting bigger |
| Waning | light is getting smaller |
| Which side of the moon is lit up during the waxing phases? | right |
| Which side of the moon is lit up during the waning phases? | left |
| Moon phases in order | new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third/last quarter, waning crescent |
| Moon's revolution period | 28.6 days |
| How long does it take for the moon to go from new moon to full moon? | 14 days |
| Terrestrial Planets | planets with rocky surfaces |
| Gas Planets | planets made up of gas |
| Inner Planets | planets closest to the sun, Mercury Venus Earth Mars |
| Outer Planets | planets farthest away from sun Jupiter Saturn Uranus Neptune |
| Asteroids | large, potato object in space that orbits the sun |
| Asteroid Belt | between the orbits of Mars and Jupiter |
| Meteors, meteoroids, meteorites in order | Meteoroids, meteors, meteorites |
Created by:
mmiller.
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