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ASTR 100 Questions with Correct Answers |
Updated (100% Correct Answers)
Which of these numbers is larger and by approximately how many
times?
a) 2.1 x 106 or 2.2 x 104
b) 2.1 x 106 by 2 times
c) 2.1 x 106 by 100 times
d) 2.2 x 104 by 2 times
e) 2.2 x 104 by 100 times Answer: c) 2.1 x 106 by 100 times
Proxima Centauri is:
a) the closest star to the Sun
b) Part of the Milky Way galaxy
c) Part of the same galaxy cluster as our Sun
d) More than 1 light year away
e) all of the above Answer: e) All of the Above
Uranus is 20 AU from the Sun. Uranus is ____________ times farther
from the Sun than the Earth is.
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a) 5
b) 10
c) 20
d) 30
e) Impossible to tell with information given. Answer: c) 20
Which of these objects is the smallest?
a) Supercluster
b) Galaxy
c) Cluster
d) Sun
e) Solar System Answer: d) Sun
Which of these is true about the scientific method?
a) The scientific method ends after astronomers test a hypothesis
two times.
b) An idea that is impossible to test can be considered a scientific
theory.
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c) The scientific method for astronomy has to mostly use
observations instead of experiments in a lab to test hypotheses.
d) When astronomers call something a theory, they mean it is an
idea that hasn't really been tested.
e) All of the above Answer: c) The scientific method for astronomy
has to mostly use observations instead of experiments in a lab to
test hypotheses.
Which of these descriptions is correct?
a) Galaxy = Group of stars, gas, and dust
b) Cluster = Group of galaxies
c) Supercluster = Group of clusters
d) All of the above Answer: d) All of the above
Our solar system is made up of the Sun and:
a) Only the 8 planets.
b) Anything larger than Pluto.
c) Anything that orbits the Sun.
d) All the other stars in our galaxy. Answer: c) Anything that orbits
the Sun.
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Which of these statements is true?
a) The closest natural object in space to the Earth is the Sun.
b) Occam's Razor says that we should always choose the most
complicated explanation for a hypothesis.
c) All the stars that we can see with the naked eye are in our solar
system.
d) Most of the atoms in our body have passed through (and in
many cases formed) in stars.
e) According to the cosmological principle, the laws of physics and
astronomy are probably different on Earth compared to a planet in
a different galaxy. Answer: d) Most of the atoms in our body have
passed through (and in many cases formed) in stars.
Which of these parts of our cosmic address is NOT correct?
a) Galaxy = Milky Way
b) Planet = Earth
c) Galaxy Cluster = Virgo Group
d) Galaxy Supercluster = Local Supercluster (also called Virgo or
sometimes Laniakea) Answer: c) Galaxy Cluster = Virgo Group
© 2025 All rights reserved
ASTR 100 Questions with Correct Answers |
Updated (100% Correct Answers)
Which of these numbers is larger and by approximately how many
times?
a) 2.1 x 106 or 2.2 x 104
b) 2.1 x 106 by 2 times
c) 2.1 x 106 by 100 times
d) 2.2 x 104 by 2 times
e) 2.2 x 104 by 100 times Answer: c) 2.1 x 106 by 100 times
Proxima Centauri is:
a) the closest star to the Sun
b) Part of the Milky Way galaxy
c) Part of the same galaxy cluster as our Sun
d) More than 1 light year away
e) all of the above Answer: e) All of the Above
Uranus is 20 AU from the Sun. Uranus is ____________ times farther
from the Sun than the Earth is.
© 2025 All rights reserved
,2
a) 5
b) 10
c) 20
d) 30
e) Impossible to tell with information given. Answer: c) 20
Which of these objects is the smallest?
a) Supercluster
b) Galaxy
c) Cluster
d) Sun
e) Solar System Answer: d) Sun
Which of these is true about the scientific method?
a) The scientific method ends after astronomers test a hypothesis
two times.
b) An idea that is impossible to test can be considered a scientific
theory.
© 2025 All rights reserved
,3
c) The scientific method for astronomy has to mostly use
observations instead of experiments in a lab to test hypotheses.
d) When astronomers call something a theory, they mean it is an
idea that hasn't really been tested.
e) All of the above Answer: c) The scientific method for astronomy
has to mostly use observations instead of experiments in a lab to
test hypotheses.
Which of these descriptions is correct?
a) Galaxy = Group of stars, gas, and dust
b) Cluster = Group of galaxies
c) Supercluster = Group of clusters
d) All of the above Answer: d) All of the above
Our solar system is made up of the Sun and:
a) Only the 8 planets.
b) Anything larger than Pluto.
c) Anything that orbits the Sun.
d) All the other stars in our galaxy. Answer: c) Anything that orbits
the Sun.
© 2025 All rights reserved
, 4
Which of these statements is true?
a) The closest natural object in space to the Earth is the Sun.
b) Occam's Razor says that we should always choose the most
complicated explanation for a hypothesis.
c) All the stars that we can see with the naked eye are in our solar
system.
d) Most of the atoms in our body have passed through (and in
many cases formed) in stars.
e) According to the cosmological principle, the laws of physics and
astronomy are probably different on Earth compared to a planet in
a different galaxy. Answer: d) Most of the atoms in our body have
passed through (and in many cases formed) in stars.
Which of these parts of our cosmic address is NOT correct?
a) Galaxy = Milky Way
b) Planet = Earth
c) Galaxy Cluster = Virgo Group
d) Galaxy Supercluster = Local Supercluster (also called Virgo or
sometimes Laniakea) Answer: c) Galaxy Cluster = Virgo Group
© 2025 All rights reserved
