1|Page
ASTRO 1 EXAM 1 NEWEST 2025/ 226 ACTUAL EXAM
COMPLETE 100 QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) |ALREADY GRADED A+||NEWEST
VERSION!!!
How did Kepler himself originally state this second law?
A: The speed of a planet in its orbit is directly proportional
to its
distance from the Sun.
B: The speed of a planet in its orbit is inversely
proportional to
its distance from the Sun.
C: All planets move at a constant speed in their orbit
around the Sun.
D: A line joining a planet and the Sun sweeps out equal
areas in equal intervals of time.
E: None of the above. - ANSWER-D: A line joining a planet
and the Sun sweeps out equal areas in equal intervals of
time.
What was Kepler's Third Law?
A: The farther away a planet is from the Sun, the shorter a
time it takes for it to complete one orbit around the Sun.
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B: The cube of the time period of the planet's orbit is
proportional to the square of its average distance from the
Sun (P^3 is proportional to a^2). C: The square of the time
period for an orbit of a planet is proportional to cube of its
average distance from Sun (in other words P^2 is
proportional to a^3).
D: The time period for an orbit of a planet is proportional to
the cube of its average distance from Sun (in other words
P is proportional to a^3).
E: The closer a planet is to the Sun, the longer a time it
takes for it to complete orbit around the Sun. - ANSWER-
C: The square of the time period for an orbit of a planet is
proportional to cube of its average distance from Sun (in
other words P^2 is proportional to a^3).
Saturn is about 10 times as far from the Sun as Earth is (a
= 10 AU,
roughly). About how many times Earth orbit the Sun in the
time
it takes Saturn to orbit just once?
A: About 3.
B: About 5
C: About 10.
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D: About 20.
E: About 30. - ANSWER-E: About 30.
Besides, the discovery that moons orbit Jupiter, what other
discovery
made by Galileo Galilei, with an early telescope, proved
that the
Earth is not at the center of the Universe?
A: the discovery of Pluto
B: the discovery of Neptune
C: the discovery that the Earth is rotating
D: the phases of Venus
E: the discovery that the Moon orbits the Earth -
ANSWER-D: the phases of Venus
We saw that Kepler's 3rd law states that P^2/a^3 =
constant. What does p represent in this equation?
A: orbital period, in this case how long it takes for a
satellite to
orbit Jupiter
B: semimajor axis, in this case half the longest axis
crossing the
, 4|Page
ellipse on which a satellite orbits Jupiter
C: pulsing timescale, in this case the length of time the
satellite
spends behind Jupiter
D: semiminor axis, in this case half the shortest axis
crossing the
ellipse on which a satellite orbits Jupiter - ANSWER-A:
orbital period, in this case how long it takes for a satellite
to
orbit Jupiter
Of the four Galilean moons which is the closest to Jupiter?
A: Io
B: Europa
C: Callisto
D: Ganymede - ANSWER-A: Io
What is ozone?
A: A mixture of many chemical elements, including
nitrogen (N),
ASTRO 1 EXAM 1 NEWEST 2025/ 226 ACTUAL EXAM
COMPLETE 100 QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) |ALREADY GRADED A+||NEWEST
VERSION!!!
How did Kepler himself originally state this second law?
A: The speed of a planet in its orbit is directly proportional
to its
distance from the Sun.
B: The speed of a planet in its orbit is inversely
proportional to
its distance from the Sun.
C: All planets move at a constant speed in their orbit
around the Sun.
D: A line joining a planet and the Sun sweeps out equal
areas in equal intervals of time.
E: None of the above. - ANSWER-D: A line joining a planet
and the Sun sweeps out equal areas in equal intervals of
time.
What was Kepler's Third Law?
A: The farther away a planet is from the Sun, the shorter a
time it takes for it to complete one orbit around the Sun.
,2|Page
B: The cube of the time period of the planet's orbit is
proportional to the square of its average distance from the
Sun (P^3 is proportional to a^2). C: The square of the time
period for an orbit of a planet is proportional to cube of its
average distance from Sun (in other words P^2 is
proportional to a^3).
D: The time period for an orbit of a planet is proportional to
the cube of its average distance from Sun (in other words
P is proportional to a^3).
E: The closer a planet is to the Sun, the longer a time it
takes for it to complete orbit around the Sun. - ANSWER-
C: The square of the time period for an orbit of a planet is
proportional to cube of its average distance from Sun (in
other words P^2 is proportional to a^3).
Saturn is about 10 times as far from the Sun as Earth is (a
= 10 AU,
roughly). About how many times Earth orbit the Sun in the
time
it takes Saturn to orbit just once?
A: About 3.
B: About 5
C: About 10.
,3|Page
D: About 20.
E: About 30. - ANSWER-E: About 30.
Besides, the discovery that moons orbit Jupiter, what other
discovery
made by Galileo Galilei, with an early telescope, proved
that the
Earth is not at the center of the Universe?
A: the discovery of Pluto
B: the discovery of Neptune
C: the discovery that the Earth is rotating
D: the phases of Venus
E: the discovery that the Moon orbits the Earth -
ANSWER-D: the phases of Venus
We saw that Kepler's 3rd law states that P^2/a^3 =
constant. What does p represent in this equation?
A: orbital period, in this case how long it takes for a
satellite to
orbit Jupiter
B: semimajor axis, in this case half the longest axis
crossing the
, 4|Page
ellipse on which a satellite orbits Jupiter
C: pulsing timescale, in this case the length of time the
satellite
spends behind Jupiter
D: semiminor axis, in this case half the shortest axis
crossing the
ellipse on which a satellite orbits Jupiter - ANSWER-A:
orbital period, in this case how long it takes for a satellite
to
orbit Jupiter
Of the four Galilean moons which is the closest to Jupiter?
A: Io
B: Europa
C: Callisto
D: Ganymede - ANSWER-A: Io
What is ozone?
A: A mixture of many chemical elements, including
nitrogen (N),
