ASTRO 7N COMPREHENSIVE EXAM
SOLVED QUESTIONS +
◉ If a red giant appears the same brightness as a red main sequence star,
which one is further away. Answer: the red giant
◉ The heaviest nuclei of all are formed. Answer: during a supernova
explosion
◉ hydrogen-2 +proton = ___+ energy. Answer: Helium-3
◉ which of the following has the smallest radius. Answer: neutron star
◉ Why does the main sequence part of a star's life end. Answer: the
hydrogen in the core is exhausted
◉ which of the following will have the shortest lifetime on the main
sequence. Answer: main sequence star with surface temperature 20000
K
◉ Many of the brightest 100 stars viewed from Earth are not on the
main sequence (even though most stars are) because:. Answer: the most
, luminous stars are giants and supergiants that have already finished there
main sequence lifetimes
◉ a 2-solar-mass main sequence star is at the same distance as a 0.2-
solar-mass main sequence star. which star appears brighter. Answer: the
2 solar mass main sequence star appears brighter
◉ the temperature of the photosphere of the Sun is closet to. Answer:
6000 Kelvin
◉ An estimate of the number of communicating/technological
civilizations that we expect in our Galaxy would have a larger number if.
Answer: the average number of planets that could support life for each
star were larger
◉ If the Sun had twice its mass, then which of the planets would be in
its habitable zone. Answer: jupiter
◉ what is the exoplanets orbital period and the percent brightness drop
in light, for the case in the image above from the Kepler Exoplanet
Transit Hunt Activity. Answer: 5 days and .30%
◉ How do astronomers measure the temperature of stars. Answer: by
looking at which absorption lines are present in the star's spectrum
SOLVED QUESTIONS +
◉ If a red giant appears the same brightness as a red main sequence star,
which one is further away. Answer: the red giant
◉ The heaviest nuclei of all are formed. Answer: during a supernova
explosion
◉ hydrogen-2 +proton = ___+ energy. Answer: Helium-3
◉ which of the following has the smallest radius. Answer: neutron star
◉ Why does the main sequence part of a star's life end. Answer: the
hydrogen in the core is exhausted
◉ which of the following will have the shortest lifetime on the main
sequence. Answer: main sequence star with surface temperature 20000
K
◉ Many of the brightest 100 stars viewed from Earth are not on the
main sequence (even though most stars are) because:. Answer: the most
, luminous stars are giants and supergiants that have already finished there
main sequence lifetimes
◉ a 2-solar-mass main sequence star is at the same distance as a 0.2-
solar-mass main sequence star. which star appears brighter. Answer: the
2 solar mass main sequence star appears brighter
◉ the temperature of the photosphere of the Sun is closet to. Answer:
6000 Kelvin
◉ An estimate of the number of communicating/technological
civilizations that we expect in our Galaxy would have a larger number if.
Answer: the average number of planets that could support life for each
star were larger
◉ If the Sun had twice its mass, then which of the planets would be in
its habitable zone. Answer: jupiter
◉ what is the exoplanets orbital period and the percent brightness drop
in light, for the case in the image above from the Kepler Exoplanet
Transit Hunt Activity. Answer: 5 days and .30%
◉ How do astronomers measure the temperature of stars. Answer: by
looking at which absorption lines are present in the star's spectrum
