If an astronaut landed on a planet made of antimatter, there would be an explosion and
A) the planet would annihilate.
B) the astronaut would annihilate.
C) the astronaut and an equal amount of the planet would both annihilate.
D) an amount of planet matter equal to that of the astronaut would annihilate.

Question

Quizplus · Accepted Answer

The astronaut and an equal amount of the planet would both annihilate because when matter and antimatter come into contact, they annihilate each other, releasing energy. The amount of matter and antimatter that annihilates is always equal.

If an Astronaut Landed on a Planet Made of Antimatter