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Space and Astronomy

Planets Practice Questions

20 free Planets practice questions for the Static GK. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.

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Question 1 of 20 Medium

Which is the closest planet to the Sun?

  1. A Mercury
  2. B Venus
  3. C Earth
  4. D Mars

Correct answer: Mercury

Mercury is the closest planet to the Sun. It has very high temperature variations due to its thin atmosphere.

Question 2 of 20 Medium

Which planet is known as the Red Planet?

  1. A Venus
  2. B Jupiter
  3. C Saturn
  4. D Mars

Correct answer: Mars

Mars is called the Red Planet due to its reddish appearance caused by iron oxide on its surface. It has been a focus of exploration.

Question 3 of 20 Medium

Which is the largest planet in the solar system?

  1. A Saturn
  2. B Earth
  3. C Jupiter
  4. D Neptune

Correct answer: Jupiter

Jupiter is the largest planet in the solar system. It is a gas giant with a massive atmosphere and many moons.

Question 4 of 20 Medium

Which planet is known for its prominent ring system?

  1. A Mars
  2. B Saturn
  3. C Uranus
  4. D Neptune

Correct answer: Saturn

Saturn is famous for its extensive ring system made of ice and rock particles. It is one of the most visually striking planets.

Question 5 of 20 Medium

Which planet is known as Earth's twin due to its similar size?

  1. A Mars
  2. B Venus
  3. C Mercury
  4. D Jupiter

Correct answer: Venus

Venus is often called Earth's twin because of its similar size and structure. However, its atmosphere is extremely hostile.

Question 6 of 20 Medium

Which planet has the most moons?

  1. A Jupiter
  2. B Saturn
  3. C Mars
  4. D Neptune

Correct answer: Saturn

Saturn has the largest number of known moons in the solar system, with over 140 confirmed satellites. Its strong gravity and extensive ring system attract many smaller celestial bodies.

Question 7 of 20 Medium

Which planet is farthest from the Sun?

  1. A Uranus
  2. B Neptune
  3. C Saturn
  4. D Jupiter

Correct answer: Neptune

Neptune is the farthest recognized planet from the Sun, orbiting at an average distance of about 4.5 billion kilometers from it.

Question 8 of 20 Medium

Which planet is known as the 'Blue Planet'?

  1. A Neptune
  2. B Earth
  3. C Uranus
  4. D Venus

Correct answer: Earth

Earth is called the Blue Planet due to the abundance of water on its surface. Oceans cover about 70% of the planet.

Question 9 of 20 Medium

Which planet rotates on its side?

  1. A Saturn
  2. B Neptune
  3. C Uranus
  4. D Mars

Correct answer: Uranus

Uranus rotates on its side with an axial tilt of about 98 degrees. This causes extreme seasonal variations.

Question 10 of 20 Medium

Which is the hottest planet in the solar system?

  1. A Mercury
  2. B Venus
  3. C Mars
  4. D Jupiter

Correct answer: Venus

Venus is the hottest planet due to its thick carbon dioxide atmosphere. It creates a strong greenhouse effect.

Question 11 of 20 Medium

Which planet has the shortest day?

  1. A Earth
  2. B Neptune
  3. C Jupiter
  4. D Saturn

Correct answer: Jupiter

Jupiter has the shortest day, rotating once approximately every 10 hours. This rapid rotation causes its flattened shape.

Question 12 of 20 Medium

Which planet is known for the Great Red Spot?

  1. A Mars
  2. B Saturn
  3. C Neptune
  4. D Jupiter

Correct answer: Jupiter

Jupiter's Great Red Spot is a massive storm that has existed for centuries. It is larger than Earth.

Question 13 of 20 Medium

Which planet is primarily composed of hydrogen and helium?

  1. A Earth
  2. B Mercury
  3. C Jupiter
  4. D Venus

Correct answer: Jupiter

Jupiter is a gas giant mainly made of hydrogen and helium. It lacks a solid surface.

Question 14 of 20 Medium

Which planet is known for its strong winds and storms?

  1. A Neptune
  2. B Mars
  3. C Earth
  4. D Mercury

Correct answer: Neptune

Neptune has the fastest winds in the solar system. Its storms can reach speeds of over 2,000 km/h.

Question 15 of 20 Medium

Which planet is known as the Morning Star or Evening Star?

  1. A Venus
  2. B Mars
  3. C Mercury
  4. D Saturn

Correct answer: Venus

Venus is often called the Morning or Evening Star because it is visible at dawn or dusk. It is very bright in the sky.

Question 16 of 20 Medium

Which planet has a prominent system of icy rings besides Saturn?

  1. A Mars
  2. B Jupiter
  3. C Uranus
  4. D Earth

Correct answer: Uranus

Uranus also has a system of rings, though less prominent than Saturn's. These rings are composed mainly of ice and rock.

Question 17 of 20 Medium

Which planet is the smallest in the solar system?

  1. A Mercury
  2. B Jupiter
  3. C Venus
  4. D Earth

Correct answer: Mercury

Mercury is the smallest planet in the solar system. It has a rocky surface with many craters.

Question 18 of 20 Medium

Which planet has two moons named Phobos and Deimos?

  1. A Mars
  2. B Earth
  3. C Jupiter
  4. D Saturn

Correct answer: Mars

Mars has two small moons, Phobos and Deimos. They are irregularly shaped and likely captured asteroids.

Question 19 of 20 Medium

Which planet is known for having a dense atmosphere with clouds of sulfuric acid?

  1. A Venus
  2. B Earth
  3. C Mars
  4. D Mercury

Correct answer: Venus

Venus has a dense atmosphere filled with carbon dioxide and sulfuric acid clouds. This makes it extremely hostile.

Question 20 of 20 Medium

Which planet takes the longest time to orbit the Sun?

  1. A Saturn
  2. B Uranus
  3. C Neptune
  4. D Jupiter

Correct answer: Neptune

Neptune takes about 165 Earth years to complete one orbit around the Sun. It is the slowest among the planets.

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