Astro 7N Exam 2 Sample Questions
2024/2025 Exam Questions with 100%
Correct Answers | Latest Update
A high luminosity star... - 🧠ANSWER ✔✔emits more light than a low
luminosity star
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 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 will have the shortest lifetime on the main sequence? - 🧠ANSWER
✔✔main sequence star with surface temperature of 20,000K
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, Many of the 100 brightest 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
their main sequence lifetimes
A 2-solar-mass main sequence star is at the same distance as a .2-solar-
mass main sequence star. Which star appears brighter? - 🧠ANSWER
✔✔the 2 solar mass star appears brighter
The temperature of the photosphere of the sun is closest to... - 🧠ANSWER
✔✔6,000K
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, which of the planets would be in its habitable
zone? - 🧠ANSWER ✔✔Jupiter
What is the exoplanet's orbital period, and the percent brightness drop in
light, for the case in the image above? - 🧠ANSWER ✔✔5 days and 0.30%
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
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PRIVACY STATEMENT. ALL RIGHTS RESERVED
2024/2025 Exam Questions with 100%
Correct Answers | Latest Update
A high luminosity star... - 🧠ANSWER ✔✔emits more light than a low
luminosity star
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 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 will have the shortest lifetime on the main sequence? - 🧠ANSWER
✔✔main sequence star with surface temperature of 20,000K
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
1
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, Many of the 100 brightest 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
their main sequence lifetimes
A 2-solar-mass main sequence star is at the same distance as a .2-solar-
mass main sequence star. Which star appears brighter? - 🧠ANSWER
✔✔the 2 solar mass star appears brighter
The temperature of the photosphere of the sun is closest to... - 🧠ANSWER
✔✔6,000K
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, which of the planets would be in its habitable
zone? - 🧠ANSWER ✔✔Jupiter
What is the exoplanet's orbital period, and the percent brightness drop in
light, for the case in the image above? - 🧠ANSWER ✔✔5 days and 0.30%
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
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PRIVACY STATEMENT. ALL RIGHTS RESERVED
