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Europa in true color

Europa in true color
Click for full image.

The photo to the right, cropped and reduced to post here, was taken on September 29, 2022 by the Jupiter orbiter Juno during its close fly-by of Europa. Citizen scientist Bjorn Jonsson has processed it to bring out the details. From his caption:

This is an approximately true color/contrast, reprocessed version of Europa image PJ45_1. It is more carefully processed than the version I posted very shortly after the raw image data was released. The color should be fairly close to Europa’s real color and probably slightly more accurate than the color of the earlier version I posted. North is up.

The Sun is coming from the right, so those are craters in the upper left, close to the shadowed limb of the planet. The red color has been known for decades, and appears in many cases to be seepage coming up from the many meandering ridges that criss-cross the planet’s surface. Their chemistry/make-up is not fully known at this time.

Juno came within 219 miles of Europa, the closest any spacecraft has come since the Galileo orbiter circled Jupiter in the 1990s. I was expecting close-up images of the surface, from that close distance, but have not yet seen any. Instead, most of the images released and processed by citizen scientists have been global images from farther away. Thus, at this moment it does not appear Juno took pictures at this closest distance.

Genesis cover

On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.

 
The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.


The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
 

"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News

2 comments

  • Doubting Thomas

    Always interested in these kinds of pictures that allow me to imagine what a particular object in our solar system would look like as I orbited or approached in my spaceship. Red seepage from meandering ridges – no one know what that comes from. I’d send a landing party down to Europa to explore but we’ve been warned to attempt no landings there. Thank you for these items. lots of grist for imagination.

    On another note, just about had it with NASA. Tuned into NASA YouTube stream to look at one minute mission trailer of Crew 5 flight. Greeted in the opening two seconds by headline that Nicole Mann Mission is the Mission Commander and “NASA’s First Indigenous Woman in Space!!!!!!” The rest of the crew is barely an afterthought. COLONEL Mann, US Marine Corps, Combat fighter pilot, Test Pilot, Masters in Fluid Mechanics, wife and mother of a boy has been reduced to a caricature to satisfy some wokemaster PR type.

    No wonder NASA can’t get things done.

  • Concerned

    Doubting Tom: NASA, like all our institutions, has been badly infiltrated by woke leftists. It’s not clear how salvageable the organization is, but with increasingly few exceptions, the track record of achievement is trending down.

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