Which of the following best describes the Milky Way Galaxy?

a spiral galaxy with a disk about 100,000 light-years in diameter and containing between 100 billion and 1 trillion stars

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a spiral galaxy with a disk about a billion kilometers in diameter and containing between 100 million and 1 billion stars

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a spiral galaxy with a disk about 100,000 light-years in diameter and containing about 100,000 stars

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a spherically shaped collection of stars including our solar system and about a dozen other solar systems, stretching about 4 light-years in diameter

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Solution

The correct option is A
a spiral galaxy with a disk about 100,000 light-years in diameter and containing between 100 billion and 1 trillion stars

Option A

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Similar questions

27, 000

Express the number appearing in the following statements in standard form.

(a) The distance between Earth and Moon is 384, 000, 000 m.

(b) Speed of light in vacuum is 300, 000, 000 m/s.

(d) Diameter of the Sun is 1, 400, 000, 000 m.

(e) In a galaxy there are on an average 100, 000, 000, 000 stars.

(f) The universe is estimated to be about 12, 000, 000, 000 years old.

(g) The distance of the Sun from the centre of the Milky Way Galaxy is estimated to be 300, 000, 000, 000, 000, 000, 000 m.

(h) 60, 230, 000, 000, 000, 000, 000, 000 molecules are contained in a drop of water weighing 1.8 gm.

(i) The earth has 1, 353, 000, 000 cubic km of sea water.

(j) The population of India was about 1, 027, 000, 000 in March, 2001.

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