Björn Jónsson
@bjorn_jonsSoftware engineer interested in solar system exploration + many other things. Advanced amateur planetary image processor. Ruler of several non-existent planets.
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Very happy to 'discover' that the @NASAJuno imagery is every bit as spectacular as Voyager/Cassini. Just a lot more challenging to process.
#Voyager 1 Target Name: #Jupiter #IO Start Time: 1979-03-04 ISS Wide Angle Filter Name: Violet green Orange red NASA/JPL/j. Roger
🆕Timelapse! Volume up, sit back and enjoy #ESAJuice's lunar-Earth flyby in all its glory 🤩
Image PJ64_44 obtained by @NASAJuno on Aug 18, 2024 in approximately true color/contrast and enhanced versions. North is up. The central north polar cyclone is visible above center at left.
🆕 Earth and Moon pose for Juice’s scientific camera, JANUS! Discover all images here 👉 esa.int/Science_Explor…
Images PJ63_18 and PJ63_37 obtained by @NASAJuno on July 16, 2024. Approximately true color/contrast and enhanced versions.
How about some volcano twilight vibes from the ongoing eruption in Iceland! Sharing is caring ❤️
La misma escena vista ~20 millones de km más lejos por otra sonda. Mission: #LUCY #DART impact experiment Target: #Didymos #Dimorphos Time: 2022-09-26/27 pdssbn.astro.umd.edu/holdings/pds4-… NASA/JPL/j. Roger
Usando la última versión de estos datos #DART Mission #LICIACube - #Leia target: #Didymos #Dimorphos NASA/ASI/j. Roger
Image PJ61_133 obtained by @NASAJuno on May 12, 2024. Approximately true color/contrast and enhanced versions. North is up.
An animation showing hows Io's specular highlights change with changing viewing geometry. The highlights are rendered using a preliminary illumination model - the specular reflections are based on the Phong illumination model. vimeo.com/914591010?ref=…
1/n A new image of #Uranus just dropped on mast.stsci.edu !!! Full size image & More info: flic.kr/p/2pwQ1en Credit: @NASA /@esa /CSA/STScI/AndreaLuck #JWST Space Telescope 2024/02/06 More info below #Space #Uranus #Astronomy #IceGiants
A map-projected montage comparing an area on Io imaged by @NASAJuno on Dec 30, 2023 (left) and Feb 3, 2024 (right). In the Feb 2024 image, specular reflections are visible whereas no such reflections are visible in the Dec 30, 2023 image. The reason: Different viewing geometry.
Image PJ58_26 from @NASAJuno on Feb 3, 2024. The small, bright features are specular reflections from features that normally appear dark (volcanic glass?). A plume is visible at lower right, it's been brightened rel to other parts of the image & is heavily processed. North is up.
This is an awesome photo of the crescent Venus. Oh, and the Moon. Credit: herbraab (flickr.com/photos/herbraa…)
After the recent article about Neptune & Uranus' colour, I had to check for myself. Here are the two, processed identically. Both were captured from home on the same night. #Neptune (L) is closer in colour than I thought, but still exhibits a deeper blue than #Uranus (R).
Can anyone point me to visible range albedo/reflectance spectra from the Jovian system? I'm especially searching for smaller features like the GRS or different parts of the surface of Io. This full disk spectrum of Jupiter is an example of what I'm looking for (Karkoschka 1994):
Twenty years ago mankind collected, for the first (and last) time, samples from a comet! On January 2, 2004, NASA's Stardust🛰 flew by Comet Wild 2 and captured dust from the comet into special aerogel collector. This is my older video from images taken during the closest flyby.
Comet 81P/Wild 2 fly-by. Animation is made from seven images (n2067we02 - n2079we02) taken by Stardust spacecraft (2.1.2004).
Img PJ57_23 of Io from @NASAJuno on 2023-12-30. N is up. The nightside's brightness was increased to show details illuminated by Jupitershine. Loki is at lower right; it's the best view of it since Voyager 1 in 1979 (PJ57_22 is a higher res but far more oblique view than PJ57_23)
A quick and early version of image PJ57_22 of Io obtained yesterday (Dec 30, 2023) by @NASAJuno North is up. The brightness of the nightside has been increased to show details illuminated by Jupitershine. The color is preliminary and probably not very far from Io's real color.
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