Contributor Posts

Vashishtha Jogi on Unsplash

NASA Astronomy Picture of the Day:

What if you saw your shadow on Mars and it wasn't human? Then you might be the Opportunity rover exploring Mars. Opportunity explored the Red Planet from 2004 to 2018, finding evidence of ancient water, and sending breathtaking images across the inner Solar System. Pictured here in 2004, Opportunity looks opposite the Sun into Endurance Crater and sees its own shadow. Two wheels are visible on the lower left and right, while the floor and walls of the unusual crater are visible in the background. Caught in a dust storm in 2018, Opportunity stopped responding, and NASA stopped trying to contact it in 2019 and declared the ground-breaking mission, originally planned for only 92 days, complete.

A chapel on the Falzarego Pass, which connects Italian towns Agordo and Cortina d'Ampezzo.

This Photo was taken by Wolfgang Moroder. Feel free to use my photos, but please mention me as the author and send me a message. This image is not in the public domain. Please respect the copyright protection. It may only be used according to the rules mentioned here. This specifically excludes use in social media, if applicable terms of the licenses listed here not appropriate. Please do not upload an updated image here without consultation with the Author. The author would like to make corrections only at his own source. This ensures that the changes are preserved.Please if you think that any changes should be required, please inform the author.Otherwise you can upload a new image with a new name. Please use one of the templates derivative or extract., CC BY-SA 3.0, via Wikimedia Commons. View source.

valentin fernandes on Unsplash

NASA Astronomy Picture of the Day:

Only two days after the February New Moon's annular eclipse of the Sun, a slender lunar crescent poses above the western horizon after sunset in this wintry twilight skyscape. Its nightside faintly illuminated by earthshine, the young Moon is joined by three bright planets in the mostly clear, early evening skies above the village of Kirazli, Turkiye. Inner planet Venus appears closest to the horizon. Near the beginning of its 2026 performance as planet Earth's evening star, brilliant Venus is seen through the warm sunset glare near picture center. Straight above Venus, innermost planet Mercury is easy to spot as it stands remarkably high above the horizon even as the twilight sky is growing dark. Outer planet Saturn, most distant of the naked-eye planets, is found just left of the Moon's sunlit crescent.

Photo by Tunc Tezel

German luger and Olympic champion Natalie Geisenberger.

Sandro Halank, Wikimedia Commons, CC BY-SA 4.0, via Wikimedia Commons. View source.

cheng feng on Unsplash

NASA Astronomy Picture of the Day:

"A ghost in the Milky Way…” says Christian Bertincourt, the astrophotographer behind this striking image of Barnard 93 (B93). The 93rd entry in Barnard’s Catalogue of Dark Nebulae, B93 lies within the Small Sagittarius Star Cloud (Messier 24), where its darkness stands in stark contrast to bright stars and gas in the background. In some ways, B93 is really like a ghost, because it contains gas and dust that was dispersed by the deaths of stars, like supernovas. B93 appears as a dark void not because it is empty, but because its dust blocks the light emitted by more distant stars and glowing gas. Like other dark nebulas, some gas from B93, if dense and massive enough, will eventually gravitationally condense to form new stars. If so, then once these stars ignite, B93 will transform from a dark ghost into a brilliant cradle of newborn stars.

Photo by Christian Bertincourt; Text: Keighley Rockcliffe (NASA GSFC, UMBC CSST, CRESST II)

This photochrom print depicts a male Irish peasant farmer standing in doorway while smoking a pipe. Today is International Pipe Smoking Day.

Photoglob Zürich, reprinted by Detroit Publishing Co., CC BY 2.0, via Wikimedia Commons. View source.