Chilgapsan Starpark Observatory in Cheongyang lists seasonal night sessions. For April–October it generally lists 19:30, 20:00 and 20:30, while a separate note for longer summer daylight gives 20:00, 20:30 and 21:00. For November–March the listed times are 18:30, 19:00 and 19:30. Bad weather may mean only a roughly 30-minute full-dome film is shown instead of astronomical observation.
Bookings open one month in advance, and same-day bookings and cancellations close at 16:00. Your booking may be cancelled if you do not purchase the entry ticket at least 10 minutes before the session. Cars must park at Chilgap Square, about 400 metres below the observatory, then walk up for roughly 5–10 minutes. Private vehicles cannot drive all the way to the facility. The narrow mountain road limits larger coaches; such groups may have to park farther downhill and walk around 40 minutes. Address: 178-46 Hantigogae-gil, Jeongsan-myeon, Cheongyang.