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Solar System Discoveries and Firsts

Astronomy

A collection of facts regarding the first human achievements and discoveries in our solar system.

space history science

15 Questions Easy Ages 5+ Apr 12, 2026

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About this Study Set

This study set covers Astronomy through 15 practice questions. A collection of facts regarding the first human achievements and discoveries in our solar system. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

Questions & Answers

Browse all 15 questions from the Solar System Discoveries and Firsts study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 Who was the first person to step onto the surface of the Moon?

A Neil Armstrong
B Buzz Aldrin
C Yuri Gagarin
D John Glenn

2 Which scientist used a telescope to discover the four largest moons of Jupiter?

A Isaac Newton
B Galileo Galilei
C Nicolaus Copernicus
D Edwin Hubble

3 What was the first artificial satellite to orbit the Earth?

A Explorer 1
B Vostok 1
C Sputnik 1
D Hubble

4 Who was the first human to travel into space?

A Alan Shepard
B Neil Armstrong
C Yuri Gagarin
D Valentina Tereshkova

5 Which planet was the first to be discovered using mathematical predictions rather than direct observation?

A Neptune
B Mars
C Saturn
D Venus

6 What was the name of the first spacecraft to land on Mars?

A Curiosity
B Viking 1
C Pathfinder
D Sojourner

7 Which woman was the first to fly in space?

A Sally Ride
B Peggy Whitson
C Valentina Tereshkova
D Kalpana Chawla

8 Which space telescope was launched in 1990 to provide clear views of the solar system and deep space?

A James Webb
B Hubble
C Kepler
D Chandra

9 What was the first probe to visit the outer solar system and exit into interstellar space?

A Voyager 1
B Pioneer 10
C New Horizons
D Cassini

10 Who proposed the heliocentric model, placing the Sun at the center of the solar system?

A Ptolemy
B Aristotle
C Nicolaus Copernicus
D Johannes Kepler

11 Which planet was discovered by William Herschel in 1781?

A Uranus
B Neptune
C Saturn
D Mars

12 What was the first spacecraft to successfully land on Venus?

A Mariner 2
B Venera 7
C Magellan
D Vega 1

13 The first human-made object to reach the surface of the Moon was part of which mission series?

A Apollo
B Luna
C Surveyor
D Ranger

14 Which planet was famously demoted from its status as a major planet in 2006?

A Ceres
B Eris
C Pluto
D Mercury

15 What was the name of the first private spacecraft to carry humans to the International Space Station?

A Dragon
B Starliner
C Orion
D Soyuz

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