The photograph used in the header of these pages was taken by Peter Simmering. It was chosen as the NASA Astronomy Picture of the Day in June, 2019. The photo captures noctilucent clouds illuminated by the setting sun over a lake just north of Zwolle, in the Netherlands. Photo used with the kind permission of Mr. Simmering.
This photograph of a sunset in the Alaskan woods was taken by Diego Delso and awarded the Wikimedia Commons Picture of the Day on January 2, 2020. Used with kind permission of Sr. Delso under License CC-BY-SA.