Part I: Extrasolar Planet Systems' Properties of Motion & Doppler Shift Extrasolar Planet Center of Mass Figure 1. Extra

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Part I Extrasolar Planet Systems Properties Of Motion Doppler Shift Extrasolar Planet Center Of Mass Figure 1 Extra 1 (58.87 KiB) Viewed 50 times

Part I Extrasolar Planet Systems Properties Of Motion Doppler Shift Extrasolar Planet Center Of Mass Figure 1 Extra 2 (67.15 KiB) Viewed 50 times

Part I Extrasolar Planet Systems Properties Of Motion Doppler Shift Extrasolar Planet Center Of Mass Figure 1 Extra 3 (39.28 KiB) Viewed 50 times

Part I: Extrasolar Planet Systems' Properties of Motion & Doppler Shift Extrasolar Planet Center of Mass Figure 1. Extrasolar planet and star as seen from above. (not to scale) Star the extrasolar planet Extrasolar Planet the extrasolar planet Center of Mass Figure 1 and Figure 2 show the orbits of the same extrasolar planet and star from two different points of view. Explain your reasoning. 1) As an extrasolar planet orbits around a star, the gravitational attraction between the two objects causes the star to make a small orbit around the system's center of mass. Which object travels in the largest orbit (circle one)? the star Star Figure 2. Extrasolar planet and star as seen edge-on or from the side. Note that the extrasolar planet is moving toward you. (not to scale) they both have the same size orbit 2) Which object takes a greater amount of time to complete one orbit (circle one)? the star they both take the same amount of time you can't determine which has the larger orbit you can't determine which takes longer
3) At the instant shown in Figure 1, which direction is the extrasolar planet moving (circle one)? toward the bottom of the page toward the bottom of the page 4) At the instant shown in Figure 1, which direction is the star moving (circle one)? toward the extrasolar planet toward the top of the page coming out of the page directly toward you toward the top of the page 5) In general, how does the direction the extrasolar planet is moving compare with the direction the star is moving? toward the star 6) Figure 2 shows the extrasolar planet and star from the side or as seen edge-on. At the instant shown, which direction is the planet moving (circle one)? Student 1: Student 2: moving into the page directly away from you toward the central star 7) Two students are having a discussion about the relationship between the movement of the central star and extrasolar planet and the Doppler shift of the light coming from the star. Since Figure 2 states that the extrasolar planet is moving out of the page, directly toward us, then the light from the star we observe will be blueshifted. I disagree, the light from the star will be redshifted because the star is moving in the opposite direction the planet is moving. Do you agree or disagree with either or both of the students? Explain your reasoning.
8) Would the light from the star in Figure 1 be blueshifted, redshifted, or not shifted? Explain your reasoning. 9) Would the light from the star in Figure 2 be blueshifted, redshifted, or not shifted? Explain your reasoning. 10) If you are unable to detect any Doppler shift from a star in an extrasolar planet system, how must this system be oriented with respect to your line of sight? Explain your reasoning and include a drawing to illustrate your answer in the space below.