Solar System — Set 3
Geography · सौर मंडल · Questions 21–30 of 70
A 'Light Year' is a unit of?
Correct Answer: D. Distance
A Light Year is a unit of distance used in astronomy. It represents the distance that light travels in one vacuum year. One light year is approximately 9.46 trillion kilometers.
What are comets primarily composed of?
Correct Answer: C. Dust and Ice
Comets are primarily composed of dust, rock, and ices (frozen gases). They are often described as 'dirty snowballs'. When they approach the Sun, the ice sublimates to create a visible tail.
The Great Red Spot is a giant storm on which planet?
Correct Answer: B. Jupiter
The Great Red Spot is a persistent high-pressure region on Jupiter. It creates an anticyclonic storm that is larger than Earth. It has been observed continuously for nearly 200 years.
Which of these planets has no natural satellites (moons)?
Correct Answer: D. Mercury
Mercury has no natural satellites or moons. Venus is the only other planet in our solar system without moons. All other planets have at least one moon.
The Milky Way is classified as which type of galaxy?
Correct Answer: D. Spiral
The Milky Way is classified as a barred spiral galaxy. Our solar system is located in one of its spiral arms called the Orion Arm. It contains hundreds of billions of stars.
Phobos and Deimos are the moons of which planet?
Correct Answer: A. Mars
Phobos and Deimos are the two small moons of Mars. They are irregularly shaped and may be captured asteroids. Phobos is the larger and closer of the two.
What is the average distance between the Earth and the Sun called?
Correct Answer: D. Astronomical Unit
The average distance between Earth and the Sun is called an Astronomical Unit (AU). One AU is approximately 150 million kilometers. It is often used to measure distances within the solar system.
Which planet is the coldest in the solar system?
Correct Answer: B. Neptune
Neptune is generally considered the coldest planet due to its distance from the Sun. However, Uranus sometimes records lower atmospheric temperatures. Neptune is an ice giant with strong winds.
The 'Big Bang Theory' explains the origin of the?
Correct Answer: B. Universe
The Big Bang Theory explains the origin of the Universe. It suggests the universe expanded from a high-density, high-temperature state billions of years ago. It is the prevailing cosmological model.
Which celestial event occurs when the Moon comes between the Sun and the Earth?
Correct Answer: A. Solar Eclipse
A Solar Eclipse occurs when the Moon passes between the Sun and the Earth. This blocks the Sun's light from reaching Earth partially or fully. It can only happen during a New Moon phase.