1. Assume a solar-mass star and a "wobble" period of one year. The larger the velocity change in the wobble, the larger the (C)
A. distance to the star.
B. mass of the planet.
C. size of the planet's orbit.
D. distance to the planet.
2. Why are planets with long orbital periods among the last to be discovered? (C)
A. Very few of these planets exist.
B. They are harder to see against the bright light of the host star.
C. Astronomers have to watch a long time before they repeat their orbits.
D. They will never block any of the light from their host star.
3. Which of the following are examples of planets that will be very difficult to detect in other solar systems? (A)
A. Super Earths
B. Mini-Earths
C. Mini-Neptunes
D. Cold Jupiters
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