Multiple choice general knowledge history

This one about a non-human explorer. Which was the first man-made object to pass beyond the known limits of the solar system?

  1. Venera 16

  2. Viking 1

  3. Pioneer 10

  4. Voyager 2
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pioneer 10, launched in 1972, was the first spacecraft to travel beyond the orbit of Pluto and leave the known solar system. It crossed Neptune's orbit in 1983 and continued into interstellar space. Voyager 1 and 2 also eventually left the solar system, but Pioneer 10 was the first to pass the outer boundaries.

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