Hanju Nam(Department of Earth Science Education, Seoul National University, Republic of Korea)
Woojin Kwon(Department of Earth Science Education, Seoul National University, Republic of Korea, SNU Astronomy Research Center, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul, 08826, Korea)
Youngwoo Choi(Department of Physics and Astronomy, Seoul National University, Republic of Korea)