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Astronomy Final

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Last updated 8 months ago
4 questions
1
1
1
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Question 1
1.

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Question 2
2.

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Question 3
3.

Question 4
4.

Match the vocab to the definitions
retrograde motion
slow rotation of the axis of a planet around another axis
precession
how the position of an object changes with respect to its background when seen from different positions
epicycle
the idea that the earth is the center of the solar system
geocentrism
how planets seem to move backwards in their orbits
parallax
a small circular orbit whose center moves around a larger circular orbit
match vocabulary to definition
semi-major axis
a regular oval shape, traced by a point moving in a plane so that the sum of its distances from two other points (the foci) is constant
ellipse
finding the angle between the line of site from one side of an object to another
period
the distance from the center of an ellipse to furthest point
angular size
the average distance from the earth to the sun
astronomical unit
the time interval of a repeating cycle
In the equation
what do p and a stand for?
p= radius and a= speed
p= area of orbital ellipse and a=sp
p= orbital period and a= semimajor axis
p= distance between foci of ellipse and a=length of year
hold your hand at arm's length away from your face. look with both eyes, and then alternate looking at your hand with just your right eye and just your left eye. The difference between what you see with just your left eye and just your right eye is an example of
precession
retrograde motion
angular size
parallax