APOD on Nostr: **Astronomy Picture of the Day** 28 September 2025 **Leopard Spots on Martian Rocks** ...
**Astronomy Picture of the Day**
28 September 2025
**Leopard Spots on Martian Rocks**
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What is creating these unusual spots? Light-colored spots on Martian rocks, each surrounded by a dark border, were discovered last year by NASA's Perseverance Rover currently exploring Mars. Dubbed leopard spots because of their seemingly similarity to markings on famous Earth-bound predators, these curious patterns are being studied with the possibility they were created by ancient Martian life. The pictured spots measure only millimeters across and were discovered on a larger rock named Cheyava Falls. The exciting but unproven speculation is that long ago, microbes generated energy with chemical reactions that turned rock from red to white while leaving a dark biosignature ring, like some similarly appearing spots on Earth rocks. Although other non-biological explanations have not been ruled out, speculation focusing on this potential biological origin is causing much intrigue.
#APOD #RocketLaunch #Cosmology #AstronautLife #CosmicWonders
https://apod.nasa.gov/apod/ap250928.htmlPublished at
2025-09-28 04:07:14 GMTEvent JSON
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"content": "**Astronomy Picture of the Day**\n\n28 September 2025\n\n**Leopard Spots on Martian Rocks**\n\nhttps://apod.nasa.gov/apod/image/2509/LeopardSpots_Perseverance_1648.jpg\n\n*Image creditor details unavailable via API. Visit linked page below for full info.*\n\nWhat is creating these unusual spots? Light-colored spots on Martian rocks, each surrounded by a dark border, were discovered last year by NASA's Perseverance Rover currently exploring Mars. Dubbed leopard spots because of their seemingly similarity to markings on famous Earth-bound predators, these curious patterns are being studied with the possibility they were created by ancient Martian life. The pictured spots measure only millimeters across and were discovered on a larger rock named Cheyava Falls. The exciting but unproven speculation is that long ago, microbes generated energy with chemical reactions that turned rock from red to white while leaving a dark biosignature ring, like some similarly appearing spots on Earth rocks. Although other non-biological explanations have not been ruled out, speculation focusing on this potential biological origin is causing much intrigue.\n\n#APOD #RocketLaunch #Cosmology #AstronautLife #CosmicWonders\n\nhttps://apod.nasa.gov/apod/ap250928.html\n",
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