Term
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Definition
| are above and below the earths poles but in the celestial sphere |
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Term
| where would you find the planets on the celestial sphere? |
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Definition
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Term
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Definition
| the earth's tilt of it's axis |
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Term
| When it is winter in France what season is it here? |
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Definition
| Winter, because it's also in the northern hemisphere |
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Term
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Definition
| the time of year when the number of hours of daylight are equal;fall and spring |
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Term
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Definition
| an imaginary sphere surrounding earth in which the stars lye |
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Term
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Definition
| beginning of Winter and SUmmer |
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Term
| What is retrograde motion |
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Definition
| the drift of the planets agaisnt the WEstern SKy |
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Term
| WIll a planet in retograde motion rise in the east or WEst each night? |
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Definition
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Term
| How long does it take the moon to go through a full cycle of phases? |
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Definition
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Term
| what cause the phases of the moon? |
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Definition
| the moon's oribt around the earth |
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Term
| during a solar eclipse what alignment is happening? |
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Definition
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Term
| during a lunar ecplise what alignment is happening? |
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Definition
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Term
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Definition
| theory that Earth is the center of the universe |
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Term
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Definition
| the sun is the center of the universe |
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Term
| Why did critics reject Aristarchus' heliocentric idea? |
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Definition
| it failed to explain parallax |
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Term
| what needed to be invented to prove that heliocentric theory was correct |
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Definition
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Term
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Definition
1, the planets oribts are eliptical
2, we speed up and slow down depending on our distance to the sun.
3, planets with bigger orbits will take longer to orbit the sun. |
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Term
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Definition
believed the earth was round based on the fact that travelers moving south could see stars previously hidden
this theory was correct. |
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Term
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Definition
mesasured the relative sizes of the Earth, Moon and Stars.
-sun was the center of the heaven's.
he was correct on realitivitly but wrong in accuracy |
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Term
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Definition
measured earth's size by using angles.
was appro. correct. |
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Term
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Definition
-model of plantery motion using crsytiline sphere
-planets moving fastest across the sky were closest to earth.
he was incorrect |
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Term
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Definition
-invented the epicycle
-proposed geometric model
-proposed epicycles to explain retrograde motion
he was incorrect |
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Term
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Definition
-1st person to describe a heliocentric model
-thought that oribits of planets were perfect circles.
he was incorrect |
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Term
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Definition
invented instruments to observe the stars
made precise measurments of geogentric model
measurments were correct |
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Term
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Definition
-1st astronomer to use the telescope
-moon's surface had mountains
-sun had dark spots
- found moon's of jupiter
he was correct |
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