Astronauts fly the craft and participate in experiments. They provide what is commonly called "human intelligence" regarding the outcome of these experiments.
Astronauts were able to conduct experiments when working in the space station. One of the space stations that was launched was the Skylab in 1973.
It is a place where astronauts conduct experiments
a space lab!
do observations, try experiments and more
Astronauts make Earth spin
space lab
Most experiments conducted are medical experiments, but fluid mechanics experiments, various experiments involving weightlessness, and testing of new technologies are also conducted.
Spacewalk,from repairs,to intalling new experiments
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Spacelab ( not used now) and Columbus.
The disadvantages of Science in Space include wasting of money for the sake of space experiments,Polluting the space with the earth elements,Risking of life by astronauts to conduct space experiments,health problems for the Astronauts and the worst of all wasting a lot of precious time for the space experiments for the sake of little profit.