Which planet is orbited by the moon Oberon?
Correct answer: Uranus
Oberon orbits Uranus. Titania is Uranus's largest moon; Oberon is the second largest.
Apollo Missions, Planets & Their Moons
Explore the Solar System and the history of space exploration in ten questions. Identify planets from clues about their moons, orbits, rotational periods and axial tilt, then move on to the final crewed Apollo lunar landing, a Mars rover and early human spaceflight. A question about the discovery of pulsars broadens the scope beyond the planets. Pay attention to whether the subject is a planet, its satellite, a spacecraft or an astronomer.
Before you start
Prepare for Apollo Missions, Planets & Their Moons
Keep scale in mind: planets, stars and galaxies are different kinds of objects, and the clues that describe them can help narrow down answers.
Questions to think about
Here is a preview of what you will explore. Answers stay hidden until you finish playing.
- Which planet is orbited by the moon Oberon?
- Which planet is closest to the Sun?
- Which Apollo mission was the final crewed mission to land on the Moon?
Choose one answer per question. When you finish, review your results and read the explanations to understand any mistakes.
10 of 10 questions currently include additional explanations.
Read the Space learning guide for more context.
Learn from the answers
The answers, explained
Check the answers, understand what you missed and take something new into your next quiz.
Which planet is closest to the Sun?
Correct answer: Mercury
Mercury orbits closest to the Sun, completing one orbit in about 88 Earth days. Despite its proximity, Venus has the highest average surface temperature because of its dense atmosphere.
Which Apollo mission was the final crewed mission to land on the Moon?
Correct answer: Apollo 17
Apollo 17 was the sixth and final Apollo mission to land astronauts on the Moon. Its crew also included geologist Harrison Schmitt, the first trained scientist to walk on the lunar surface.
Further reading: airandspace.si.edu ↗
Which planet has the largest axial tilt, measured from the perpendicular to its orbital plane, when retrograde rotation is expressed as a tilt greater than 90 degrees?
Correct answer: Venus
With retrograde rotation expressed as an obliquity greater than 90 degrees, Venus has an axial tilt of about 177 degrees. The angle is measured from a line perpendicular to the orbital plane.
Which Mars rover landed in Gale Crater in 2012?
Correct answer: Curiosity
NASA's Curiosity rover landed inside Gale Crater on Mars on 6 August 2012. It studies the planet's geology and climate to assess whether ancient Mars could once have supported microbial life.
Further reading: science.nasa.gov ↗
Which planet's rotation period is about 10.7 hours, making its day second-shortest among the planets?
Correct answer: Saturn
Saturn completes a rotation in roughly 10.7 hours, although measurements vary because the planet has no solid surface and different parts of its atmosphere can rotate at different rates.
Further reading: science.nasa.gov ↗
Who was the first human to travel into space?
Correct answer: Yuri Gagarin
Yuri Gagarin became the first human in space on 12 April 1961, completing one orbit of Earth in the Vostok 1 spacecraft before returning safely.
Further reading: www.nasa.gov ↗
Which planet was the first to be discovered with the aid of a telescope?
Correct answer: Uranus
William Herschel discovered Uranus in 1781 while observing the sky with a telescope. The discovery expanded the known Solar System beyond the planets visible to the unaided eye.
Further reading: science.nasa.gov ↗
What is the smallest planet in the Solar System?
Correct answer: Mercury
Mercury is the smallest of the eight planets by diameter. Pluto is smaller, but it is classified as a dwarf planet rather than one of the eight planets.
Which astronomer discovered the first pulsar, with Antony Hewish's research group?
Correct answer: Jocelyn Bell Burnell
Jocelyn Bell Burnell discovered pulsars in 1967 while a postgraduate researcher at Cambridge working with Antony Hewish. The discovery came from identifying repeated pulses in radio-telescope recordings.
Explore the questionsBrowse all 10 questions in this quiz
- Which planet is orbited by the moon Oberon?
- Which planet is closest to the Sun?
- Which Apollo mission was the final crewed mission to land on the Moon?
- Which planet has the largest axial tilt, measured from the perpendicular to its orbital plane, when retrograde rotation is expressed as a tilt greater than 90 degrees?
- Which Mars rover landed in Gale Crater in 2012?
- Which planet's rotation period is about 10.7 hours, making its day second-shortest among the planets?
- Who was the first human to travel into space?
- Which planet was the first to be discovered with the aid of a telescope?
- What is the smallest planet in the Solar System?
- Which astronomer discovered the first pulsar, with Antony Hewish's research group?
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