This study aimed to standardize the BVR CCD photometry system of the Gwangju Science High School Observatory. We have observed Landolt standard stars using the CDK14 telescope and the STX-16803 CCD camera and carried out the data reduction by Maxim DL. As a result, we estimated the atmospheric extinction coefficients using the observation on August 29 and 31, 2024. By a standardization procedure, we calculated instrumental magnitudes and color indices outside the atmosphere. The instrumental magnitudes of celestial objects measured on the ground by the atmospheric correction were successfully transformed into standard magnitudes, with the standardization conversion formulas provided as following equations. The observational analysis revealed that atmospheric extinction coefficients vary depending on the observing conditions and that extinction increases at short wavelength. Additionally, the B filter exhibited significant second-order extinction effects due to color indices, suggesting the necessity of applying second-order atmospheric extinction coefficients for precise observations. This study suggests that Gwangju Science High School Observatory can serve as reliable resources for both educational and research purposes. Furthermore, this study demonstrates the potential for producing high-precision photometric data that meet international standards, even at a secondary school-level observatory. These findings are expected to contribute significantly to future astronomical education and research.
Citizen science engages the general public in scientific research, providing opportunities to enhance scientific literacy and inquiry skills. This study aims to explore how participation in the ‘Mission Galaxy’ citizen science project affects high school students' attitudes toward astronomy and science, the development of their scientific inquiry skills, and strategies to sustain their interest and engagement in citizen science activities. From a methodological perspective, a one-group pretest-posttest design was applied to investigate changes in students’ attitudes and skills. A total of 115 high school students participated in the study. Before and after participation, students completed a survey measuring their attitudes toward astronomy and science. Additionally, qualitative data were collected through semi-open questionnaire and interviews to analyze students’ experiences and perceptions. After participating in the citizen science project, students showed significant improvement in their confidence in learning astronomy (p=0.003) and their overall perception of science (p=0.018). Among scientific inquiry skills, observation (31%) and classification (25.4%) showed the most significant improvement, followed by inference (14.1%). In order to ensure students’ continued participation, it was confirmed that interface design and feedback system construction that stimulate participants’ interest and motivation are necessary. The results of this study provide important implications for exploring the meaning of educational use of citizen science projects and ways to induce continuous participation.