The aim of this research is to investigate the effects of outdoor learning environments such as space camp on the perceptions of secondary school students about astronomy, career choices, and development of 21st century skills. Izmir space camp trip was organized in 2019. Qualitative study was conducted with secondary school 5th grade students attending the space camp (N = 24). Semi-structured interview form, focus group interview, space camp evaluation form and researcher observation notes were used as data collection tools. Data analysis was evaluated with content analysis and open coding. Students participated in the program of stars and planets adventure. In this program, the participants had the opportunity to use astronaut training simulators that give the feeling of living and working in space, to perform simulated shuttle missions, to learn new information from experts in the field and to get more detailed information about the professions. At the end of the study, it was revealed that out of school learning environments such as space camps had a positive effect on students. As a result of the study, it has been observed that the students perform their duties in a team collaboration in shuttle mission and develop their critical, questioning and thinking skills by experiencing the discussions about the subject with the experts. In addition, the misconception about Pluto was also determined.