本帖最後由 C.L.Chan 於 2018-1-15 10:14 編輯
獵戶座 M42 大星雲 , 是發光星雲之表表者 , 它是氣體匯聚形成恆星的地方 , 稱為恆星產房 , 新生的恆星發出很強的紫外光 , 激發附近星雲發出獨特的紅光 . OrionM42 Nebula, 2018/01/14, HKT 21h10 to 13m , Telescope:Astro Physics, Star 12 ED, D=12cm, F.L.=102cm, Prime Focus, Losmandy G-11Equatorial Mount with motor drive. Manual object targeting. Canon EOS 700D Camera , IR Low pass filter removed. ISO800, 30 sec exposure. CRW Format. Lightframes 6x, Dark frames 5x, Bias frames 5x ,flat frames 12x. Stacking by DeepSky Stacker freeware and processed by Microsoft photo . Atmospheric Transparent:79/10, Seeing :7/10. Equipment borrowedfrom Mr. Ng. Taken at Kennedy Town, 堅尼地城Hong Kong .
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