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--- blog:aardvaark:iotd [2020/06/28 08:55] – Phil Ide
+++ blog:aardvaark:iotd [2025/08/02 04:59] (current) – external edit 127.0.0.1
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 ~~NOCACHE~~
 ====== NASA Image of the Day ======
-Date: **Sun 28th June, 2020**\\
+Date: **Sat 2nd August, 2025**\\
-Title: **Europa and Jupiter from Voyager 1**
+Title: **Fireflies, Meteors, and Milky Way**
 === ===
-What are those spots on Jupiter? Largest and furthest, just right of center, is the Great Red Spot -- a huge storm system that has been raging on Jupiter possibly since Giovanni Cassini's likely notation of it 355 years ago.
+Taken on July 29 and July 30, a registered and stacked series of exposures creates this dreamlike view of a northern summer night. Multiple firefly flashes streak across the foreground as the luminous Milky Way arcs above the horizon in the Sierra de Órganos national park of central Mexico, The collection of bright streaks aligned across the sky toward the upper left in the timelapse image are Delta Aquariid meteors. Currently active, the annual Delta Aquarid meteor shower shares August nights though, overlapping with the better-known Perseid meteor shower. This year that makes post-midnight, mostly moonless skies in early August very popular with late night skygazers. How can you tell a Delta Aquariid from a Perseid meteor?  The streaks of Perseid meteors can be traced back to an apparent radiant in the constellation Perseus. Delta Aquariids appear to emerge from the more southerly constellation Aquarius, beyond the top left of this frame. Of course, the bioluminescent flashes of fireflies are common too on these northern summer nights. But how can you tell a firefly from a meteor? Just try to catch one.
+[[https://apod.nasa.gov/apod/image/2508/DeltaAqrFireflies.jpg|{{https://apod.nasa.gov/apod/image/2508/DeltaAqrFireflies1024.jpg?800|Click image to enlarge}}]]
+Image copyright: Daniel Korona<html><sup></html>(c)<html></sup></html>\\
+Click the image for a larger view (opens in a new tab)
-It is not yet known why this Great Spot is red. The spot toward the lower left is one of Jupiter's largest moons: Europa. Images from Voyager in 1979 bolster the modern hypothesis that Europa has an underground ocean and is therefore a good place to look for extraterrestrial life. But what about the dark spot on the upper right? That is a shadow of another of Jupiter's large moons: Io. Voyager 1 discovered Io to be so volcanic that no impact craters could be found.
+//If you leave a comment below, please enter the date when referring to images. I can go back and fetch images for a specific date if you request it.//
-Sixteen frames from Voyager 1's flyby of Jupiter in 1979 were recently reprocessed and merged to create the featured image.
-About 43 years ago, Voyager 1 launched from Earth and started one of the greatest explorations of the Solar System ever.
-Free Download: Voyager Posters
-[[https://apod.nasa.gov/apod/image/2006/EuropaJupiter_Voyager_2792.jpg|{{https://apod.nasa.gov/apod/image/2006/EuropaJupiter_Voyager_960.jpg?800|Click image to enlarge}}]]
-\\
-Click the image for a larger view (opens in a new tab)
 ~~socialite~~
 ~~DISCUSSION~~