Comets are typically visible for only a few months. Based on their orbits and Ke

Question

Comets are typically visible for only a few months. Based on their orbits and Kepler's Laws, why? (Consider, for example, an average short period comet with a period of 100 years.) Using the information in Table 1 and Equations 2 and 3 on p. 6-2, calculate - showing all your work how much closer the Earth is at perihelion than it is at aphelion. What month is it (in the northern hemisphere) when the Earth is at perihelion (go find this on the Internet)? Are you surprised by either of these pieces of information? Explain why or why not. Mercury travels 39 km/sec when it is at its farthest from the Sun. Using the information in Table 1, Equations 2 and 3 on p. 6-2, and Equation 4 on p. 6-9, calculate how fast Mercury travels when it is at its closest to the Sun. Show all your work.

Explanation / Answer

1. Based upon the orbital period's Comets are classified as

For Question 2 and 3 please provide Table 1

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