Who discovered that the planet Saturn possesses a second massive satellite moon named Rhea? MCQ with Answer and Explanation

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Who discovered that the planet Saturn possesses a second massive satellite moon named Rhea?

A. Christiaan Huygens

B. Giovanni Domenico Cassini

C. William Herschel

D. Galileo Galilei

Answer: Option B

Solution (By JKSSB Mock Tests)

Cassini discovered Rhea in 1672, alongside Tethys, Dione, and Iapetus, using long focal length aerial telescopes.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered that certain types of biological viruses infect and replicate exclusively inside bacterial cell hosts, establishing 'Bacteriophages'?

A. Louis Pasteur

B. Robert Koch

C. Dmitri Ivanovsky

D. Frederick Twort and Félix d'Hérelle

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Correct Answer: Option D

Explanation:
Twort and d'Hérelle independently isolated filterable bacterial lysis agents, establishing early phage therapeutic concepts.

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The invention of the common electronic computational methodology known as microprogramming was proposed by whom?

A. Charles Babbage

B. John von Neumann

C. Maurice Wilkes

D. Alan Turing

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Correct Answer: Option C

Explanation:
Wilkes formulated microprogramming in 1951 to simplify computer central processing unit development matrix layers.

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Who discovered that the planet Jupiter possesses a massive permanent high-pressure cyclonic storm, the Great Red Spot?

A. Galileo Galilei

B. Giovanni Domenico Cassini and Robert Hooke

C. William Herschel

D. Christiaan Huygens

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Correct Answer: Option B

Explanation:
Hooke and Cassini recorded spot features on Jupiter in the 1660s using early optical compound scopes.

This question belongs to: Static General Knowledge Inventions and Discoveries

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