Consider the following statements about the "Universe": 1. It is a cluster of millions of stars. 2. It contains millions of galaxies. 3. It is difficult to imagine how big it is. Which of the statements given above is/are correct?

Consider the following statements about the "Universe": 1.… - NCERT Class 6 Geography MCQ

NCERT Class 6 Geography — Chapter 1: The earth in the solar system

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Consider the following statements about the "Universe":

It is a cluster of millions of stars.
It contains millions of galaxies.
It is difficult to imagine how big it is.

Which of the statements given above is/are correct?

NCERT textbook question

From NCERT The Earth Our Habitat · Page 6

Options

A1 and 2 only
B2 only
C2 and 3 only
D1, 2 and 3

Did you get this right?

Solution

The correct option is (c).

Explanation

The Universe represents the totality of all matter, energy, and space. Its structure is hierarchical, where stars aggregate to form galaxies, and galaxies aggregate to form the Universe.

Statement 1 is Incorrect: A huge system or cluster of millions (or billions) of stars, clouds of dust, and gases is technically defined as a Galaxy (such as the Milky Way). The Universe is not a single cluster of stars but the container for all such clusters.

Statement 2 is Correct: The Universe is constituted by millions of galaxies. These galaxies are the primary massive structures that populate the vastness of space.

Statement 3 is Correct: The Universe is infinite or near-infinite in scale, and it is constantly expanding. Consequently, its exact size is unknown, making it difficult to imagine its true magnitude.

Key Takeaway: There is a distinct hierarchy in celestial organization: a Galaxy is a group of stars, while the Universe is the collection of millions of galaxies.

Your note

More from Chapter 1: The earth in the solar system

With reference to the Moon, consider the following statements: 1. Its diameter is only one-quarter that of the Earth. 2. It moves around the Earth in about 45 days. 3. It takes significantly longer to complete one spin on its axis than to orbit the Earth. Which of the statements given above is/are correct?

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The rings around Jupiter, Saturn, and Uranus are composed of:

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Consider the following statements regarding Asteroids: 1. They are tiny bodies that move around the Sun. 2. They are found between the orbits of Earth and Mars. 3. Scientists believe they are parts of a planet which exploded many years back. Which of the statements given above is/are correct?

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With reference to the distance from the Sun, which planet lies between Venus and Mars?

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Consider the following statements regarding the Solar System: 1. It consists of the Sun, eight planets, satellites, asteroids, and meteoroids. 2. The Earth is in the center of the solar system. 3. All planets move around the Sun in elongated paths. Which of the statements given above is/are correct?

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