Multiple choice

The expression Little Green Men (LGM) denotes

  1. Rapidly spinning neutron stars

  2. An alien civilization in the galaxy

  3. Dinosaurs in Jurassic park

  4. An astrophysical discovery by S. Chandrasekhar
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A Correct answer
Explanation

LGM originally stood for 'Little Green Men,' a humorous name given by astronomers to pulsars (rapidly spinning neutron stars) when they were first discovered as mysterious radio sources. The term was later co-opted by popular culture to refer to aliens.

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