DescriptionDrawing of the first observed light echo.gif
English: Two images showing the drawings of the Light Echo around the Nova Persei 1901. Drawn by G.W. Ritchey at the Yerkes Observatory. The first image is from September 20, 1901 and the second is from November 13, 1901.
Overlayed and converted into a gif-animation with Adobe Photoshop by Meli_thev.
Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country. Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Drawing_of_the_first_observed_light_echo.gif