Questions & Answers
Browse all 18 questions from the
Solar System Historical Milestones in North America study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
Which North American observatory was the first to confirm the existence of Pluto in 1930?
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A
Lowell Observatory
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B
Mount Wilson Observatory
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C
Palomar Observatory
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D
Yerkes Observatory
2
In 1962, the Mariner 2 mission was the first to successfully conduct a flyby of another planet. What was that planet?
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A
Mars
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B
Venus
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C
Mercury
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D
Jupiter
3
Which American spacecraft was the first to achieve a soft landing on the surface of Mars in 1976?
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A
Viking 1
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B
Pathfinder
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C
Curiosity
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D
Spirit
4
The first American to orbit the Earth, John Glenn, flew in which spacecraft in 1962?
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A
Gemini 3
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B
Freedom 7
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C
Friendship 7
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D
Liberty Bell 7
5
In 1989, the Voyager 2 spacecraft provided the first close-up images of which planet's rings and moons?
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A
Uranus
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B
Neptune
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C
Saturn
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D
Jupiter
6
Which mission launched from Cape Canaveral in 1977 carried a 'Golden Record' containing sounds and images of Earth?
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A
Pioneer 10
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B
Voyager 1
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C
Voyager 2
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D
Pioneer 11
7
What was the name of the first U.S. space station, launched into orbit in 1973?
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A
Skylab
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B
Salyut
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C
Mir
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D
International Space Station
8
In 1997, the Mars Pathfinder mission deployed which first-ever successful robotic rover on the Martian surface?
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A
Opportunity
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B
Sojourner
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C
Curiosity
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D
Perseverance
9
Which American astronomer is credited with the 1929 discovery that the universe is expanding?
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A
Percival Lowell
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B
Edwin Hubble
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C
Carl Sagan
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D
Clyde Tombaugh
10
What was the primary goal of the Lunar Reconnaissance Orbiter (LRO) launched by NASA in 2009?
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A
Mapping lunar resources
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B
Testing fusion engines
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C
Searching for Martian water
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D
Monitoring solar flares
11
The 1965 Mariner 4 mission was significant for providing the first close-up images of which planet's cratered surface?
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A
Venus
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B
Mars
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C
Mercury
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D
Moon
12
Which U.S. satellite, launched in 1958, discovered the Van Allen radiation belts surrounding Earth?
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A
Explorer 1
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B
Vanguard 1
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C
Sputnik 1
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D
Telstar 1
13
In 1973, which probe became the first spacecraft to traverse the asteroid belt and visit Jupiter?
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A
Pioneer 10
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B
Pioneer 11
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C
Voyager 1
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D
Voyager 2
14
Which space telescope, launched in 1990 from the Space Shuttle Discovery, fundamentally changed our understanding of the solar system's scale?
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A
Spitzer
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B
Hubble
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C
Chandra
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D
Kepler
15
In 1967, which mission resulted in the tragic fire that led to major safety redesigns of the Command Module?
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A
Apollo 1
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B
Apollo 7
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C
Apollo 11
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D
Gemini 8
16
Which planet was discovered by William Herschel in 1781, though later identified as a solar system component by North American scientists?
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A
Neptune
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B
Uranus
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C
Saturn
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D
Pluto
17
The 'Messenger' mission was the first American spacecraft to orbit which planet, starting in 2011?
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A
Mercury
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B
Venus
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C
Mars
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D
Saturn
18
In 1969, the Apollo 11 mission landed on the Moon. Which specific lunar region did they touch down in?
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A
Sea of Tranquility
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B
Ocean of Storms
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C
Sea of Serenity
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D
Sea of Clouds
