Astronomy Final - Gwyneth Lenfest | Library | Formative

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Match the vocab to the definitions

Draggable item		Corresponding Item
epicycle		slow rotation of the axis of a planet around another axis
parallax		how the position of an object changes with respect to its background when seen from different positions
geocentrism		the idea that the earth is the center of the solar system
precession		how planets seem to move backwards in their orbits
retrograde motion		a small circular orbit whose center moves around a larger circular orbit

match vocabulary to definition

Draggable item		Corresponding Item
ellipse		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
period		finding the angle between the line of site from one side of an object to another
astronomical unit		the distance from the center of an ellipse to furthest point
semi-major axis		the average distance from the earth to the sun
angular size		the time interval of a repeating cycle