Who discovered that the Milky Way is just one of many distinct independent galaxy clusters across space? MCQ with Answer and Explanation

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Who discovered that the Milky Way is just one of many distinct independent galaxy clusters across space?

A. William Herschel

B. Edwin Hubble

C. Galileo Galilei

D. Johannes Kepler

Answer: Option B

Solution (By JKSSB Mock Tests)

Hubble identified Cepheid variable stars in the Andromeda Nebula, computing its enormous distance outside our own galactic boundaries.

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Question #1

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The invention of the common household vacuum storage device known as the Thermos Flask was developed by whom?

A. James Dewar

B. Willis Carrier

C. James Joule

D. Thomas Edison

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Correct Answer: Option A

Explanation:
Sir James Dewar invented the double-walled vacuum-insulated silvered glass flask in 1892 to isolate cryogenic liquefied gases.

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Question #2

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The invention of the jet engine is attributed to which British engineer?

A. Frank Whittle

B. Hans von Ohain

C. James Dyson

D. Christopher Cockerell

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Correct Answer: Option A

Explanation:
Sir Frank Whittle submitted the first patent for a turbojet engine in 1930, though Germany's Hans von Ohain built the first operational jet plane independently later.

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Question #3

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Who discovered that the velocity of falling objects is completely independent of their weight in a vacuum?

A. Aristotle

B. Johannes Kepler

C. Isaac Newton

D. Galileo Galilei

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Correct Answer: Option D

Explanation:
Galileo mathematically disproved Aristotle's weight-proportional velocity model via rigorous acceleration measurements down inclined tracks.

This question belongs to: Static General Knowledge Inventions and Discoveries

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