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Astronomy Picture from 08/03/2021

Three Tails of Comet NEOWISE

Source: https://apod.nasa.gov/apod/ap210308.htm<a href="/hashtag/CometNEOWISE" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link">#CometNEOWISEt#SodiumTaild#Spacel#Astronomys#Astrophysicso#Comets#RareCometa#NightSkyN#Cosmologyo#Science#Science
A stunning long-exposure photograph of Comet NEOWISE (C/2020 F3) showcasing its unusual red sodium tail, alongside a blue ion tail and a white dust tail. Captured in Brittany, France, this image reveals the comet's vibrant colors against a backdrop of stars. The red tail, a rare phenomenon caused by sodium atoms released from the comet's nucleus, is a highlight of this celestial event.
March 12, 2025 at 10:13 PM
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Astronomy Picture from 08/07/2020

Mercury's Sodium Tail

Source: https://apod.nasa.gov/apod/ap200708.htm<a href="/hashtag/Mercury" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link">#Mercury##SodiumTaild#PlanetaryTailt#SpaceSciencee#Astrophotographyt#Astronomys#Cosmologyo#SolarSystema#MESSENGERE#DeepSpaceeepSpace
A long-exposure image reveals Mercury's faint sodium tail, a glowing streak extending from the planet. Captured through a yellow filter highlighting the sodium emission, the image shows Mercury and its tail against a backdrop of stars. This phenomenon, first predicted in the 1980s and confirmed in 2001, showcases the unexpected dynamism of even the innermost planet.
March 27, 2025 at 10:13 PM