The expanding nature of the universe was discovered by which astronomer? MCQ with Answer and Explanation

Question
The expanding nature of the universe was discovered by which astronomer?
A. Edwin Hubble
B. Galileo Galilei
C. Johannes Kepler
D. Albert Einstein
Answer: Option A
Solution (By JKSSB Mock Tests)
Edwin Hubble discovered in 1929 that galaxies are moving away from each other, indicating that the universe is expanding.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Practice More Inventions and Discoveries Questions

Question #1
Who discovered the existence of the Van Allen Radiation Belts surrounding the Earth?
A. Robert Goddard
B. Carl Sagan
C. James Van Allen
D. Wernher von Braun
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Correct Answer: Option C

Explanation:
James Van Allen discovered the zones of trapped charged particles around Earth using data from the Explorer 1 satellite in 1958.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
Who discovered the mathematical value and formula for the Universal Gravitational Constant ($G$) using a torsion balance?
A. Isaac Newton
B. Henry Cavendish
C. Albert Einstein
D. Robert Hooke
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Correct Answer: Option B

Explanation:
Henry Cavendish measured the density of the Earth and effectively calculated the value of the gravitational constant $G$ in 1798.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
The first modern nuclear reactor, Chicago Pile-1, was built under the supervision of which physicist?
A. Enrico Fermi
B. J. Robert Oppenheimer
C. Albert Einstein
D. Niels Bohr
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Correct Answer: Option A

Explanation:
Enrico Fermi led the team that created the first artificial self-sustaining nuclear chain reaction in 1942.
This question belongs to: Static General Knowledge Inventions and Discoveries
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