Planets are large objects that orbit a star, like how Earth orbits the Sun. They come in different sizes and types, such as rocky planets like Earth and gas giants like Jupiter. The Universe and Solar System help us learn about how the universe began and how things like galaxies, stars, and planets work. These topics are important for school and exams. Here are some multiple-choice questions (MCQs) that cover important ideas like the Big Bang Theory, galaxies, star patterns, solstices, equinoxes, planets, moons, comets, asteroids, and the Sun. Practice these MCQs so that you will know what type of questions are asked in the exams.
Which planet is called the “Gaseous Giant” and is the largest in the solar system, with a diameter of 142,800 km?
a) Neptune
b) Saturn
c) Jupiter
d) Uranus
Answer: c) Jupiter
The Great Red Spot, a giant storm that has lasted for centuries, is found on which planet?
a) Mars
b) Jupiter
c) Saturn
d) Neptune
Answer: b) Jupiter
Which planet is called the “Ringed Planet” because of its spectacular system of rings made of ice and rock particles?
a) Uranus
b) Saturn
c) Jupiter
d) Neptune
Answer: b) Saturn
Which planet rotates on its side (axis tilted about 98°), giving it the title of the “Sideways Planet”?
a) Uranus
b) Neptune
c) Saturn
d) Venus
Answer: a) Uranus
Which planet is called the “Blue Planet” because of the methane gas in its atmosphere that gives it a bluish color?
a) Uranus
b) Neptune
c) Earth
d) Venus
Answer: b) Neptune
Which is the only planet in the solar system where life is known to exist, with suitable temperature, water, and oxygen?
a) Venus
b) Earth
c) Mars
d) Jupiter
Answer: b) Earth
Which planet has the fastest rotation period, completing one rotation in just 9 hours and 55 minutes?
a) Earth
b) Jupiter
c) Neptune
d) Mercury
Answer: b) Jupiter
Which planet has the slowest rotation, taking about 243 Earth days to complete one rotation on its axis?
a) Venus
b) Saturn
c) Uranus
d) Neptune
Answer: a) Venus
Due to the presence of iron oxide (rust) on its surface, which planet is called the “Red Planet”?
a) Jupiter
b) Mars
c) Saturn
d) Neptune
Answer: b) Mars
Which planet is called the “Morning Star” or “Evening Star” because of its brightness in the sky, though it is actually a planet?
a) Mars
b) Venus
c) Jupiter
d) Saturn
Answer: b) Venus
Which is the smallest planet in our solar system, closest to the Sun, with no air and very hot and cold temperatures?
a) Mars
b) Mercury
c) Venus
d) Pluto
Answer: b) Mercury
Which two planets of our solar system are called the “Twin Planets” because of their similar size, mass, and density?
a) Earth and Mars
b) Venus and Earth
c) Jupiter and Saturn
d) Neptune and Uranus
Answer: b) Venus and Earth
What is the name of the scientist who discovered the planet Uranus?
a) Copernicus
b) Herschel
c) Kepler
d) Galileo
Answer: b) Herschel,ṁ
Who discovered the Laws of Planetary Motion and showed that planets travel in oval-shaped (elliptical) paths around the Sun?
b) Johannes Kepler
c) Isaac Newton
d) Tycho Brahe
Answer: b) Johannes Kepler
Which natural satellite of Saturn is known for having a thick atmosphere and lakes of liquid methane, resembling early Earth?
a) Ganymede
b) Titan
c) Io
d) Enceladus
Answer: b) Titan
Which scientist first said that the Sun is at the center of the solar system and all the planets go around it?
b) Copernicus
c) Kepler
d) Ptolemy
Answer: b) Copernicus
what is a big piece of rock or metal that moves around the Sun and is mostly found between Mars and Jupiter in the Asteroid Belt.
a) Comet
b) Meteorite
c) Asteroid
d) Satellite
Answer: c) Asteroid
What space objects are made of ice, dust, and gases, and grow long glowing tails when they get close to the Sun?
a) Asteroids
b) Meteors
c) Comets
d) Satellites
Answer: c) Comets
The most well-known comet that shows up about every 76 years is called:
a) Hale-Bopp
b) Halley’s Comet
c) Encke’s Comet
d) Tempel-Tuttle
Answer: b) Halley’s Comet
Which planet takes the longest time to go around the Sun, about 165 Earth years?
a) Uranus
b) Neptune
c) Saturn
d) Jupiter
Answer: b) Neptune
Which planet goes around the Sun the fastest, taking only 88 days?
a) Venus
b) Earth
c) Mercury
d) Mars
Answer: c) Mercury
Which planet’s atmosphere is dominated by carbon dioxide and thick clouds of sulfuric acid, creating a greenhouse effect and very high surface temperatures?
a) Mars
b) Venus
c) Jupiter
d) Earth
Answer: b) Venus
The Sun is made up of which two gases?
a) Hydrogen and Oxygen
b) Helium and Nitrogen
c) Hydrogen and Helium
d) Carbon and Hydrogen
Answer: c) Hydrogen and Helium
What is the approximate time taken by sunlight to reach Earth?
a) 2 minutes
b) 5 minutes
c) 8 minutes 20 seconds
d) 12 minutes
Answer: c) 8 minutes 20 seconds
The energy of the Sun is produced in its core by which process?
a) Nuclear Fission
b) Nuclear Fusion
c) Combustion of Gases
d) Radioactive Decay
Answer: b) Nuclear Fusion
Which scientist improved the telescope and used it to observe moons of Jupiter, phases of Venus, and supported the heliocentric theory?
a) Copernicus
b) Kepler
c) Galileo Galilei
d) Newton
Answer: c) Galileo Galilei
