誰遺筆硯在冷海?
本帖最後由 C.L.Chan 於 2021-4-22 11:59 編輯誰遺筆硯在冷海?這裡是月球的北極山區,橫過中央的玄武岩平原就是冷海, 左下是” 墨硯”柏拉圖平底坑,直徑101km, 右下的” 直筆” 就是阿爾卑斯大峽谷,長 166km, 闊 10km, 其中還見小溪” 流淌”.Sea of Cold, Plato Crater, and Vallis Alpes. UT 2021 04 21, 14h14m,Telescope TEC Maksutov-Cassegrain MC200/20, D=20cm, F.L.=400cm, Losmandy G-11Equatorial Mount with motor drive. Camera QHY 5III 224 Color Cam, Capture with FireCapture, Shoot at Gamma=100, Gain=40, Expo= 0.413 ms/frame, avi format, stack and process 35% best frames in 1804 frames by free Software AutoStakkert3, wavelet with RegiStax V.6, Final touch by Microsoft Photo software.Atmospheric condition: Transparent: 9/10, Seeing : 8/10. Equipment borrowed from Mr. Ng. The photo was taken at Kennedy Town 堅尼地城, Hong Kong.
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