File:Drawing of the first observed light echo.gif
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:00, 14 September 2022 | ![]() | 636 × 631 (435 KB) | Meli thev | Uploaded a work by Ritchey, G. W. from https://ui.adsabs.harvard.edu/abs/1901ApJ....14..293R/abstract with UploadWizard |
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