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FINAL EXAM ASTRONOMY
ACTUAL QUESTIONS 2026 WITH
VERIFIED ANSWERS.
1. Which of the following spacecraft is NOT leaving the solar
system? - correct answer-Galileo
2. In the , photons take approximately between 100,000 to
1,000,000 years to "random walk" towards the surface of the
Sun. - correct answer-radiative zone
3. One key difference that astronomers use to distinguish
between brown dwarfs and high-mass planets is that: -
correct answer-brown dwarfs are able to do deuterium fusion
in their cores, while planets can't
4. Which of the following has the stellar spectral classes
correctly ordered from hottest to coolest? - correct answer-
OBAFGKM
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5. The first astronomer who did photometry in a systematic way
(even though they did not have a telescope) was - correct
answer-Hipparchus
6. Ninety percent of all stars (if plotted on an H-R diagram)
would fall into a region astronomers call: - correct answer-the
main sequence
7. Measurements show a certain star has a very high luminosity
(100,000 x the Sun's) while its temperature is quite cool
(3500 K). How can this be? - correct answer-it must be quite
large in size
8. Which technique allows astronomers to detect exoplanets by
the planet dimming the star's light as it passes in front of the
star? - correct answer-Transit method
9. The Orion Nebula is - correct answer-a large cloud of gas
and dust illuminated by the light of newly formed stars within
it
FINAL EXAM ASTRONOMY
ACTUAL QUESTIONS 2026 WITH
VERIFIED ANSWERS.
1. Which of the following spacecraft is NOT leaving the solar
system? - correct answer-Galileo
2. In the , photons take approximately between 100,000 to
1,000,000 years to "random walk" towards the surface of the
Sun. - correct answer-radiative zone
3. One key difference that astronomers use to distinguish
between brown dwarfs and high-mass planets is that: -
correct answer-brown dwarfs are able to do deuterium fusion
in their cores, while planets can't
4. Which of the following has the stellar spectral classes
correctly ordered from hottest to coolest? - correct answer-
OBAFGKM
, Page | 2
5. The first astronomer who did photometry in a systematic way
(even though they did not have a telescope) was - correct
answer-Hipparchus
6. Ninety percent of all stars (if plotted on an H-R diagram)
would fall into a region astronomers call: - correct answer-the
main sequence
7. Measurements show a certain star has a very high luminosity
(100,000 x the Sun's) while its temperature is quite cool
(3500 K). How can this be? - correct answer-it must be quite
large in size
8. Which technique allows astronomers to detect exoplanets by
the planet dimming the star's light as it passes in front of the
star? - correct answer-Transit method
9. The Orion Nebula is - correct answer-a large cloud of gas
and dust illuminated by the light of newly formed stars within
it
