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UPSC CSE Science & Tech 2022

Question

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

AA hypersonic missile is launched into space to counter the asteroid approaching the Earth and explode it in space.
BA spacecraft lands on another planet after making several orbital motions.
CA missile is put into a stable orbit around the Earth and deorbits over a target on the Earth.
DA spacecraft moves along a comet with the same speed and places a probe on its surface.
✓ Correct Answer — C

Explanation

A Fractional Orbital Bombardment System (FOBS) places a warhead into a low Earth orbit, and before completing a full revolution, fires retro-rockets to deorbit it over its target — letting it approach from an unexpected direction and dodge early-warning radar.

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