In the context of space exploration, which of the following statements best describes the term "Spacewalk"?
1
A space activity where astronauts test new equipment inside the spacecraft to simulate the conditions outside.
2
A period of time spent outside a spacecraft by an astronaut, typically for the purpose of conducting science experiments, repairs, or testing equipment in outer space.
3
A walk performed on Earth under controlled environments designed to mimic space conditions for astronaut training.
4
A procedure carried out within the International Space Station (ISS) to examine how astronauts adapt to microgravity over an extended period.