Why are many of the newly detected extrasolar planets called hot Jupiters?
A) Their masses and composition are similar to what we would expect if Jupiter were hotter.
B) The planets tend to be detected around more massive, hotter stars than our Sun.
C) Their masses are similar to Jupiter but they are very close to the central star and therefore hot.
D) Their masses are similar to Jupiter but their composition is similar to Mercury.
E) The discovery of other planets is very exciting.
Question 2Of the first exoplanets found, most were detected by:
A) noting the drop in the star's light as the planet transits its disk.
B) imaging them with the HST in the infrared, where they are easier to stop.
C) noting the Doppler shifts of the star as the planet orbits it from side to side.
D) receiving radio transmissions from them, much like Jupiter emits.
E) detecting the oxygen in their atmospheres spectroscopically.
Question 3Stars of lower mass have deeper convection zones outside their cores than stars of higher mass.
Indicate whether the statement is true or false
Question 4In the evolution of massive stars, what is the significance of the temperature 600 million K?
A) It is the temperature at which helium fuses into carbon.
B) It is the temperature needed for carbon fusing into heavier elements.
C) It is the main sequence core temperature which makes massive stars so bright.
D) It is the temperature needed for helium burning into boron.
E) It is the final temperature reached during their evolution.
Question 5So far, beyond the solar system the exoplanets found have been mostly:
A) large jovians orbiting solar-type stars about where our jovians are found.
B) large jovians with terrestrial-type orbits.
C) terrestrials very close to their star, and transiting its disk.
D) terrestrials with very elongated, distant orbits like comets.
E) brown dwarfs much more massive than Jupiter.
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