Q: 6 (IES/2015)

Viking 2, Pathfinder and Phoenix are the names of:
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 (a) Voyager-2 (b) New Horizons (c) LISA Pathfinder (d) Evolved LISA
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