Teacher s guide and student activities.
Marble ous ellipses.
The variation is due to the centripetal acceleration provided by the gravitational attraction of the sun.
It is a common misconception among students that planetary orbits are circular.
In order to understand the orbits of planets comets and other celestial bodies it is necessary to examine the principles of how gravity and the velocity of an object interact to produce an orbit.
Teacher s guide and student activities.
Marble ous ellipses classroom demonstration video vp02 access the video.
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This video part of a new series of esa teaching resources called teach with space shows an experiment that can be performed by teachers in the classroom to demonstrate kepler s laws of planetary motion in particular how orbiting bodies sweep out equal areas in equal times and the dramatic.
Speed and time of orbiting bodies.
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This activity puts speed time graphs in a space context by looking at the elliptical orbits.
Marble ous ellipses speed and time of orbiting bodies classroom demonstration video vp02.
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The change in the comet tail is also shown.
P02 marble ous ellipses figure a3.
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It is a common misconception among students that planetary orbits are.