Astro 201 Exercise 6

1. Sketch an ellipse, labeling 2 foci, center, major and minor axes, where the sun might be, and where a planet orbits.
2. Using Newton's gravity law (page 91), if earth were 0.5 AU from the sun, would earth feel twice the gravitational pull? Explain.

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Last modified: Thu Aug 19 14:14:06 CDT 1999