El rover Curiosity de la NASA en Marte captó el 2 de febrero de 2023 cómo unos rayos de luz solar iluminaban un banco de nubes mientras el 'astro rey' se ponía por el horizonte. Estos 'rayos solares' también se conocen como rayos crepusculares. Era la primera vez que los rayos solares se veían con tanta claridad en Marte. Además, Curiosity captó el 27 de enero un conjunto de nubes de colores con forma de pluma. Cuando son iluminadas por la luz solar, ciertos tipos de nubes pueden crear un espectáculo parecido al arco iris llamado iridiscencia.
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etiquetas: marte , sol , curiosity , iridiscencia 
As the Sun descended over the horizon on Feb. 2, rays of light illuminated a bank of clouds. These “sun rays” are also known as crepuscular rays, from the Latin word for “twilight.” It was the first time sun rays have been so clearly viewed on Mars.
Curiosity captured the scene during the rover’s newest twilight cloud survey, which builds on its 2021 observations of noctilucent, or night-shining, clouds. While most Martian clouds hover no more than 37 miles (60 kilometers) above the ground and are composed of water ice, the clouds in the latest images appear to be at a higher altitude, where it’s especially cold. That suggests these clouds are made of carbon dioxide ice, or dry ice.
www.nasa.gov/feature/jpl/nasa-s-curiosity-views-first-sun-rays-on-mars
Fuente: www.jpl.nasa.gov/news/nasas-curiosity-views-first-sun-rays-on-mars
Comunicado de la NASA:
“Where we see iridescence, it means a cloud’s particle sizes are identical to their neighbors in each part of the cloud,” said Mark Lemmon, an atmospheric scientist with the Space Science Institute in Boulder, Colorado. “By looking at color transitions, we’re seeing particle size changing across the cloud. That tells us about the way the cloud is evolving and how its particles are changing size over time.”
www.nasa.gov/feature/jpl/nasa-s-curiosity-views-first-sun-rays-on-mars