GS PrelimsScience and TechnologyUniverse and Space Technology2022

Which one of the following statements best reflects the idea behind the "Fractional Orbital Bombardment System" often talked about in media?

A

A hypersonic missile is launched into space to counter the asteroid approaching the Earth and explode it in space.

B

A spacecraft lands on another planet after making several orbital motions.

C

A missile is put into a stable orbit around the Earth and deorbits over a target on the Earth.

D

A spacecraft moves along a comet with the same speed and places a probe on its surface.

Correct Answer: Option C

Explanation

1. The question asks for the statement that best describes the "Fractional Orbital Bombardment System" (FOBS). 2. FOBS is a concept developed during the Cold War. It involves launching a nuclear warhead into a low Earth orbit. 3. Unlike a typical satellite, the warhead does not complete a full orbit. Instead, it flies on a partial (fractional) orbit before deorbiting and descending towards its target on Earth. 4. Option (A) describes a planetary defense scenario against an asteroid using a hypersonic missile, which is unrelated to FOBS. 5. Option (B) describes a standard spacecraft landing procedure on another planet. 6. Option (C) accurately reflects the idea behind FOBS: a missile (carrying a warhead) is put into a stable orbit around the Earth and then deorbits over a target. 7. Option (D) describes a comet rendezvous mission, like the Rosetta mission. 8. Therefore, statement (C) best reflects the concept of FOBS.

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