Add more sweeps. Erase all sweeps with the “erase sweeps” button.The “sweep continuously” check box will cause sweeps to be createdcontinuously when sweeping. Test this option.Question 11: Erase all sweeps and create an ellipse with a = 1 AU and e = 0. Set thefractional sweep size to one-twelfth of the period. Drag the sweep segment around.Does its size or shape change?
Question 12: Leave the semi-major axis at a = 1 AU and change the eccentricity to e =0.5. Drag the sweep segment around and note that its size and shape change. Where isthe sweep segment the “skinniest”? Where is it the “fattest”? Where is the planet when itis sweeping out each of these segments? (What names do astronomers use for thesepositions?)
Question 13: What eccentricity in the simulator gives the greatest variation of sweepsegment shape?
Question 14: Halley’s comet has a semimajor axis of about 18.5 AU, a period of 76 years,and an eccentricity of about 0.97 (so Halley’s orbit cannot be shown in this simulator.)The orbit of Halley’s Comet, the Earth’s Orbit, and the Sun are shown in the diagrambelow (not exactly to scale). Based upon what you know about Kepler’s 2ndLaw, explainwhy we can only see the comet for about 6 months every orbit (76 years)?
Lab 4 NAAP – Planetary Orbit Simulator 5/8