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vocabulary
| Term | Definition |
|---|---|
| heliocentric theory | sun in the center |
| Geocentric theory | puts the earth in the center of the universe |
| milky way galaxy | the galaxy of which sun and solar system are a part and which contains myriads of stars that create light of the milky way |
| planets | a celestial body moving in an elliptical orbit around a star |
| sun | the star around which the earth orbits |
| corona | the rarefied gaseous envelope of the sun and other stars |
| phases of the moon | The moon is less than one-half illuminated by the sun but less than one quarter illuminated. |
| waxing | the moon at any time after new moon and before full moon, so called because its illuminated area is increasing. Compare waning moon. Origin of waxing moon. |
| waning | the moon at any time after full moon and before new moon (so called because its illuminated area is decreasing). ... Also called old moon. Compare waxing moon. |
| crescent | A crescent is a thin, curved shape that's thicker in the middle and tapers to thin points at each end, like the little sliver of moon you might notice in the sky. Crescent was first used to describe the shape of the waxing, or growing moon, and if you lis |
| gibbous | It's easy to see a waxing gibbous moon in the daytime because, at this phase of the moon, a large fraction of the moon's day side is facing our way. ... Any moon that appears more than half lighted but less than full is called a gibbous moon. The word gib |
| asteroids | a small rocky body orbiting the sun. Large numbers of these, ranging in size from nearly 600 miles (1,000 km) across (Ceres) to dust particles, are found (as the asteroid belt ) especially between the orbits of Mars and Jupiter, though some have more ecce |
| meteror | a small body of matter from outer space that enters the earth's atmosphere, becoming incandescent as a result of friction and appearing as a streak of light. |
| comet | a celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away from the sun. |
| asteroid belt | The asteroid belt is the circumstellar disc in the Solar System located roughly between the orbits of the planets Mars and Jupiter. It is occupied by numerous irregularly shaped bodies called asteroids or minor planets. |
| revolution | a forcible overthrow of a government or social order in favor of a new system. |
| orbit | the curved path of a celestial object or spacecraft around a star, planet, or moon, especially a periodic elliptical revolution. |
| rotation | the action of rotating around an axis or center. |
| gravity | the force that attracts a body toward the center of the earth, or toward any other physical body having mass. For most purposes Newton's laws of gravity apply, with minor modifications to take the general theory of relativity into account. |
| Alignment of moon,sun, and earth | It is a common misconception that a planetary alignment is when three or more planets line up perfectly, either in line with the sun or not. There are a few factors involved in calculating the extreme rarity of such an event, but the main one is the fact |
| solar eclipse | an eclipse in which the sun is obscured by the moon. |
| lunar eclipse | an eclipse in which the moon appears darkened as it passes into the earth's shadow. |
| Neap tides | a tide just after the first or third quarters of the moon when there is the least difference between high and low wate |
| spring tides | a tide just after a new or full moon, when there is the greatest difference between high and low water. |
Created by:
caytlynoneal
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