**Astronomy Picture of the Day**
25 October 2023
**Gone in 60 Seconds: A Green Flash Sunset**
https://www.youtube.com/embed/J3_88eyN44w?rel=0
Image Credit & Copyright:
Tengyu Cai
In 60 seconds, this setting Sun will turn green. Actually, the top of the Sun already appears not only green, but wavey -- along with all of its edges. The Sun itself is unchanged -- both effects are caused by looking along hot and cold layers in Earth's atmosphere. The unusual color is known as a green flash and occurs because these atmospheric layers not only shift background images but disperse colors into slightly different directions, like a prism. The featured video was captured earlier this month off the coast of Hawaii, USA. After waiting those 60 seconds, at the video's end, the upper part of the Sun seems to hover alone in space, while turning not only green, but blue. Then suddenly, the Sun appears to shrink to nothing -- only to return tomorrow.
#APOD #GalacticAdventures #SpaceMission #Astrotheory #SpaceExploration
https://apod.nasa.gov/apod/ap231025.html
APOD
npub1ap…f5l75
2023-10-25 04:06:50
Author Public Key
npub1ap0dw55xedm5w4mkcyq8m7xyluwfc680lywrvfe50vr9ckl5m3uqtf5l75Published at
2023-10-25 04:06:50Event JSON
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"content": "**Astronomy Picture of the Day**\n\n25 October 2023\n\n**Gone in 60 Seconds: A Green Flash Sunset**\n\nhttps://www.youtube.com/embed/J3_88eyN44w?rel=0\n\nImage Credit \u0026 Copyright: \nTengyu Cai\n\n\nIn 60 seconds, this setting Sun will turn green. Actually, the top of the Sun already appears not only green, but wavey -- along with all of its edges. The Sun itself is unchanged -- both effects are caused by looking along hot and cold layers in Earth's atmosphere. The unusual color is known as a green flash and occurs because these atmospheric layers not only shift background images but disperse colors into slightly different directions, like a prism. The featured video was captured earlier this month off the coast of Hawaii, USA. After waiting those 60 seconds, at the video's end, the upper part of the Sun seems to hover alone in space, while turning not only green, but blue. Then suddenly, the Sun appears to shrink to nothing -- only to return tomorrow.\n\n#APOD #GalacticAdventures #SpaceMission #Astrotheory #SpaceExploration\n\nhttps://apod.nasa.gov/apod/ap231025.html\n",
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