What do the astronauts do on the space station?

Answer 1

They conduct experiments that cannot be performed on earth .The absence of gravity can affect crystal growth, insect behaviour for example.

The effect on the human body is important since zero G can cause skeletal problems and muscle wasting. The astronauts are bombarded with high energy particles which can kill cells and cause flashes of light in the eyes. Water recycling and living in a sealed environment with enough food for 2 years poses special problems if man is going to travel to Mars. This is the likely duration for a return mission to our nearest planet.

Answer 2

Astronauts on the space station conduct scientific experiments, perform maintenance tasks on the station, exercise to stay healthy in microgravity, communicate with mission control, and prepare for spacewalks or upcoming missions. They also document their experiences through photos and videos to share with the public.