The reason that most extrasolar planets discovered by the transit technique are found close to their parent stars is
A) the closer to a star, the hotter and therefore brighter the planet is.
B) they transit more frequently, and have thus been more likely to be detected in the short time we have been searching for them.
C) the wavelength shift of the star's spectrum is larger.
D) planets that are close to a star are heated up and therefore larger.
E) more of the starlight is blocked by the planet when it transits the star.
B
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a. True b. False Indicate whether the statement is true or false
In the late 1800s, Kelvin and Helmholtz suggested that the Sun stayed hot because of gravitational contraction. What was the major drawback to this idea?
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In the figure, a stunt car driver negotiates the frictionless track shown in such a way that the car is barely in contact with the track at the top of the loop
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