901年的老照片：猎户大星云
2019 August 17 1901 Photograph: The Orion Nebula Image Credit: George Ritchey, Yerkes Observatory – Digitization Projec…
Ritchey
2019 August 17 1901 Photograph: The Orion Nebula Image Credit: George Ritchey, Yerkes Observatory – Digitization Projec…