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ASTRO 1 EXAM 2 NEWEST 2025 ACTUAL
EXAM COMPLETE 50 QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+||BRAND
NEW VERSION!!
1. Relative to an observer at rest, time for an observer that travels
at high speed:
a. Is the same
b. Is slower
c. Is faster - CORRECT ANSWER ✔✔B
2. The equivalence principle tells us that experiments performed
on a spaceship accelerating through space at 1g will give the same
results as experiments performed on Earth
a. True
b. False - CORRECT ANSWER ✔✔A
3. If you could travel away from Earth at a speed close to the
speed of light, you would find your own time to be running more
slowly because of the time dilation.
a. True
b. False - CORRECT ANSWER ✔✔B
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4. Spacetime is
a. The combination of time and the three dimensions of space
b. A curved rubber sheet
c. Another name for gravity - CORRECT ANSWER ✔✔A
5. Which of the following regions of interstellar gas have the
lowest densities and cannot form stars?
a. Hot bubbles
b. Molecular cloud cores
c. Molecular clouds
d. Warm atomic gas
e. Cool atomic clouds - CORRECT ANSWER ✔✔A
6. We know that a black hole lies at our galaxy's center because
numerous stars near it have vanished over the past several years,
telling us that they've been sucked in
a. True
b. False - CORRECT ANSWER ✔✔B
7. True or False? If a black hole ten times more massive than our
Sun were lurking just beyond Pluto's orbit, we'd have no way of
knowing it was there
a. True. Black holes do not emit light so they cannot be detected
b. True. Such a low mass black hole would have no influence on
the solar system
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c. False. It would be readily apparent as a pulsating radio source in
the outer solar system
d. False. X-ray observations would reveal its presence as it sucked
in material around it
e. False. Such a black hole would measurably affect the orbits of
the planets - CORRECT ANSWER ✔✔E
8. You can see a clock in a spaceship moving past you at 90% of
the speed of light. According to you, how much time would pass
while the clock in the spaceship ticked through one minute?
a. Less than one minute
b. A minute on the ship, which is exactly two minutes for you
c. A minute on the ship, which is the same as a minute for you
d. More than one minute - CORRECT ANSWER ✔✔D
9. Officer Albert departs the police station that orbits Earth. As the
patrol ship accelerates to relativistic speeds, Officer Albert's
thoughts turn to his twin brother, Stephen, who has never left
Earth. They were born by Caesarean section at exactly the same
time. Will they still be the same age when Albert returns from his
patrol?
a. No. Stephen will be older than Albert
b. Yes, they will still be the same age
c. No. Albert will be older than Stephen - CORRECT ANSWER ✔✔A
ASTRO 1 EXAM 2 NEWEST 2025 ACTUAL
EXAM COMPLETE 50 QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+||BRAND
NEW VERSION!!
1. Relative to an observer at rest, time for an observer that travels
at high speed:
a. Is the same
b. Is slower
c. Is faster - CORRECT ANSWER ✔✔B
2. The equivalence principle tells us that experiments performed
on a spaceship accelerating through space at 1g will give the same
results as experiments performed on Earth
a. True
b. False - CORRECT ANSWER ✔✔A
3. If you could travel away from Earth at a speed close to the
speed of light, you would find your own time to be running more
slowly because of the time dilation.
a. True
b. False - CORRECT ANSWER ✔✔B
,2|Page
4. Spacetime is
a. The combination of time and the three dimensions of space
b. A curved rubber sheet
c. Another name for gravity - CORRECT ANSWER ✔✔A
5. Which of the following regions of interstellar gas have the
lowest densities and cannot form stars?
a. Hot bubbles
b. Molecular cloud cores
c. Molecular clouds
d. Warm atomic gas
e. Cool atomic clouds - CORRECT ANSWER ✔✔A
6. We know that a black hole lies at our galaxy's center because
numerous stars near it have vanished over the past several years,
telling us that they've been sucked in
a. True
b. False - CORRECT ANSWER ✔✔B
7. True or False? If a black hole ten times more massive than our
Sun were lurking just beyond Pluto's orbit, we'd have no way of
knowing it was there
a. True. Black holes do not emit light so they cannot be detected
b. True. Such a low mass black hole would have no influence on
the solar system
, 3|Page
c. False. It would be readily apparent as a pulsating radio source in
the outer solar system
d. False. X-ray observations would reveal its presence as it sucked
in material around it
e. False. Such a black hole would measurably affect the orbits of
the planets - CORRECT ANSWER ✔✔E
8. You can see a clock in a spaceship moving past you at 90% of
the speed of light. According to you, how much time would pass
while the clock in the spaceship ticked through one minute?
a. Less than one minute
b. A minute on the ship, which is exactly two minutes for you
c. A minute on the ship, which is the same as a minute for you
d. More than one minute - CORRECT ANSWER ✔✔D
9. Officer Albert departs the police station that orbits Earth. As the
patrol ship accelerates to relativistic speeds, Officer Albert's
thoughts turn to his twin brother, Stephen, who has never left
Earth. They were born by Caesarean section at exactly the same
time. Will they still be the same age when Albert returns from his
patrol?
a. No. Stephen will be older than Albert
b. Yes, they will still be the same age
c. No. Albert will be older than Stephen - CORRECT ANSWER ✔✔A
