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Solar System - GK Objective Questions and Answers

(1) Identify the planet whose length of the days and tilt of its axis are almost identical to those of the earth.
[A] Uranus
[B] Neptune
[C] Saturn
[D] Mars

Comment

Answer: Option [D]

The correct answer is Mars. Mars is the correct answer because it is true that the length of the day on Mars and the tilt of its axis are nearly identical to those on Earth.

(2) Among the following planets, which is the brightest planet ?
[A] Mercury
[B] Venus
[C] Mars
[D] Jupiter

Comment

Answer: Option [B]

The correct answer is Venus. The planet Venus is the brightest among all the eight planets in the Solar System. It has thick atmosphere rich in carbondioxide which makes it highly reflective, hence making it the brightest planet in the night sky. This in fact, made ancient people to believe that Venus might be a star.

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(3) Which of the following planets of the solar system has the longest day ?
[A] Mercury
[B] Jupiter
[C] Venus
[D] Earth

Comment

Answer: Option [C]

The correct answer is Venus. Venus has the longest day of any planet in our solar system. It completes one rotation every 243 Earth days. Its day lasts longer than its orbit. It orbits the Sun every 224.65 Earth days, so a day is nearly 20 Earth days longer than its year.

(4) Which planet is called the red planet in our solar system ?
[A] Mercury
[B] Mars
[C] Jupiter
[D] Neptune

Comment

Answer: Option [B]

The correct answer is Mars. Mars is known as the Red Planet because iron minerals in the Martian soil oxidize, or rust, causing the soil and atmosphere to look red.

(5) The largest planet in our solar system is :
[A] Jupiter
[B] Earth
[C] Venus
[D] Mercury

Comment

Answer: Option [A]

The largest planet in our solar system is Jupiter. Jupiter is the fifth planet from the Sun and the largest in the Solar System. It is a gas giant with a mass more than two and a half times that of all the other planets in the Solar System combined, but slightly less than one-thousandth the mass of the Sun.

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