UPSC Previous Year Question | Prelims GS | 2020

'The experiment will employ a trio of spacecraft flying in formation in the shape of an equilateral triangle that has sides one million kilometres long, with lasers shining between the craft.' The experiment in question refers to

  1. Voyager-2
  2. New Horizons
  3. LISA Pathfinder
  4. Evolved LISA

Answer

Correct Answer

Evolved LISA

Explanation

eLISA (Evolved LISA) is a planned mission of three spacecraft in a triangular formation, linked by lasers, to detect gravitational waves. LISA Pathfinder was only the technology demonstrator, and Voyager-2 and New Horizons are unrelated.

Topics: evolved laser interferometer space antenna (elisa) - gravitational waves, science & technology, space missions, space technology & astrophysics