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DobviewsSaturn and a Few Moons 🧪 <a href="https://mstdn.social/tags/saturn" class="mention hashtag" rel="nofollow noopener" target="_blank">#saturn</a> <a href="https://mstdn.social/tags/tethys" class="mention hashtag" rel="nofollow noopener" target="_blank">#tethys</a> <a href="https://mstdn.social/tags/mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#mimas</a> <a href="https://mstdn.social/tags/pandora" class="mention hashtag" rel="nofollow noopener" target="_blank">#pandora</a> <a href="https://mstdn.social/tags/titan" class="mention hashtag" rel="nofollow noopener" target="_blank">#titan</a> <a href="https://mstdn.social/tags/enceladus" class="mention hashtag" rel="nofollow noopener" target="_blank">#enceladus</a> <a href="https://mstdn.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#astronomy</a> <a href="https://mstdn.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#nature</a> <a href="https://mstdn.social/tags/astrophography" class="mention hashtag" rel="nofollow noopener" target="_blank">#astrophography</a> <a href="https://mstdn.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#photography</a> <a href="https://mstdn.social/tags/smartphoneastronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#smartphoneastronomy</a><a href="https://youtube.com/playlist?list=PLuPz1whIP_i9q9EPnMbHJVqDjwWRYFadp&si=4H2SmkHvCrudrRYR" rel="nofollow noopener" translate="no" target="_blank">https://youtube.com/playlist?list=PLuPz1whIP_i9q9EPnMbHJVqDjwWRYFadp&si=4H2SmkHvCrudrRYR</a>

Khurram Wadee ✅<a href="https://mastodon.org.uk/tags/Mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mimas</a>: Small <a href="https://mastodon.org.uk/tags/Moon" class="mention hashtag" rel="nofollow noopener" target="_blank">#Moon</a> with a Big <a href="https://mastodon.org.uk/tags/Crater" class="mention hashtag" rel="nofollow noopener" target="_blank">#Crater</a> <a href="https://mastodon.org.uk/tags/Astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#Astronomy</a> <a href="https://mastodon.org.uk/tags/Picture" class="mention hashtag" rel="nofollow noopener" target="_blank">#Picture</a> of the Day<a href="https://apod.nasa.gov/apod/ap250112.html" rel="nofollow noopener" translate="no" target="_blank">https://apod.nasa.gov/apod/ap250112.html</a><a href="https://mastodon.org.uk/tags/APOD" class="mention hashtag" rel="nofollow noopener" target="_blank">#APOD</a>

Garry EvesIn this video I am focusing on the Just Turnings Mimas fountain pen.We take a look at the pen and how it writes with Diamine Inkvent 2021 Vintage Copper ink.<a href="https://youtu.be/7icsDTy0uJ8" rel="nofollow noopener" translate="no" target="_blank">https://youtu.be/7icsDTy0uJ8</a><a href="https://mastodon.social/tags/fountainpens" class="mention hashtag" rel="nofollow noopener" target="_blank">#fountainpens</a> <a href="https://mastodon.social/tags/fountainpen" class="mention hashtag" rel="nofollow noopener" target="_blank">#fountainpen</a> <a href="https://mastodon.social/tags/penreview" class="mention hashtag" rel="nofollow noopener" target="_blank">#penreview</a> <a href="https://mastodon.social/tags/writing" class="mention hashtag" rel="nofollow noopener" target="_blank">#writing</a> <a href="https://mastodon.social/tags/JustTurningsMimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#JustTurningsMimas</a> <a href="https://mastodon.social/tags/JustTurnings" class="mention hashtag" rel="nofollow noopener" target="_blank">#JustTurnings</a> <a href="https://mastodon.social/tags/Mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mimas</a> <a href="https://mastodon.social/tags/handmade" class="mention hashtag" rel="nofollow noopener" target="_blank">#handmade</a> <a href="https://mastodon.social/tags/turnedpen" class="mention hashtag" rel="nofollow noopener" target="_blank">#turnedpen</a> <a href="https://mastodon.social/tags/handturned" class="mention hashtag" rel="nofollow noopener" target="_blank">#handturned</a> <a href="https://mastodon.social/tags/handturned" class="mention hashtag" rel="nofollow noopener" target="_blank">#handturned</a> <a href="https://mastodon.social/tags/turned" class="mention hashtag" rel="nofollow noopener" target="_blank">#turned</a> <a href="https://mastodon.social/tags/DiamineVintageCopper" class="mention hashtag" rel="nofollow noopener" target="_blank">#DiamineVintageCopper</a> <a href="https://mastodon.social/tags/InkventVintageCopper" class="mention hashtag" rel="nofollow noopener" target="_blank">#InkventVintageCopper</a> <a href="https://mastodon.social/tags/Diamine" class="mention hashtag" rel="nofollow noopener" target="_blank">#Diamine</a>

Phil StookeHere is the northern hemisphere of Mimas in that full Voyager mosaic.These maps are never going to look great compared with Cassini imaging. My intention here is to show how some details not noticed at the time were indeed present in Voyager images. We will see some more of these in the coming days. <a href="https://mastodon.social/tags/maps" class="mention hashtag" rel="nofollow noopener" target="_blank">#maps</a> <a href="https://mastodon.social/tags/Saturn" class="mention hashtag" rel="nofollow noopener" target="_blank">#Saturn</a> <a href="https://mastodon.social/tags/Voyager" class="mention hashtag" rel="nofollow noopener" target="_blank">#Voyager</a> <a href="https://mastodon.social/tags/Mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mimas</a>

Phil StookeAt last, here is the composite map using Voyager 1 and 2 images of little Mimas. Most of the surface is covered. You might like to compare it with this Cassini map:<a href="https://www.jpl.nasa.gov/images/pia17214-mimas-global-map-june-2017/" rel="nofollow noopener" translate="no" target="_blank">https://www.jpl.nasa.gov/images/pia17214-mimas-global-map-june-2017/</a>I pointed out that my map and the USGS map don't agree in crater positions in places. Neither of them match this very well. Pointing uncertainties, an incorrect shape model of Mimas in early mapping (not really a sphere) and other errors affect both of them. <a href="https://mastodon.social/tags/Saturn" class="mention hashtag" rel="nofollow noopener" target="_blank">#Saturn</a> <a href="https://mastodon.social/tags/Voyager" class="mention hashtag" rel="nofollow noopener" target="_blank">#Voyager</a> <a href="https://mastodon.social/tags/Mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mimas</a>

Phil StookeThe same for Voyager 2. Those rather unpromising images actually do have some details to add in the northern hemisphere. Tomorrow - putting it all together. <a href="https://mastodon.social/tags/Saturn" class="mention hashtag" rel="nofollow noopener" target="_blank">#Saturn</a> <a href="https://mastodon.social/tags/Voyager" class="mention hashtag" rel="nofollow noopener" target="_blank">#Voyager</a> <a href="https://mastodon.social/tags/Mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mimas</a>

Phil StookeEnough of the individual images, let's make a map! Here is a cylindrical projection photomosaic map made using the Voyager 1 images. Compare it with the USGS shaded relief map we started with. It extends a bit further out in some areas (e.g. north and south of the biggest crater, Herschel). If you overlay this map on the USGS map in photo-editing software, you will notice that features don't match exactly, there is some mis-registration. We'll look at this later. <a href="https://mastodon.social/tags/Saturn" class="mention hashtag" rel="nofollow noopener" target="_blank">#Saturn</a> <a href="https://mastodon.social/tags/Voyager" class="mention hashtag" rel="nofollow noopener" target="_blank">#Voyager</a> <a href="https://mastodon.social/tags/Mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mimas</a>

Phil StookePutting those images together is a bit tricky because there's a bit of rotation between them, but here is the result. More images would give better results - I'll look out for a better example later. With pictures like these you have to do everything you can. Now we are spoiled by amazing Cassini images, but imagine some future time when a super-telescope is imaging planets around other stars. You do what you can even with poor images. <a href="https://mastodon.social/tags/Saturn" class="mention hashtag" rel="nofollow noopener" target="_blank">#Saturn</a> <a href="https://mastodon.social/tags/Voyager" class="mention hashtag" rel="nofollow noopener" target="_blank">#Voyager</a> <a href="https://mastodon.social/tags/Mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mimas</a>

Phil StookeLet's look at that idea with Mimas images. It's not the greatest example - it only uses 2 images - but I did this over 20 years ago and it's not always easy to find the files. Here are two Voyager 1 images taken during approach, enlarged 5 times without resampling (i.e. nearest neighbor), letting us see the pixels. All the same features are present but not sampled exactly the same by the pixel grid. With 2 images it's not real super-resolution, more just noise reduction. <a href="https://mastodon.social/tags/Saturn" class="mention hashtag" rel="nofollow noopener" target="_blank">#Saturn</a> <a href="https://mastodon.social/tags/Voyager" class="mention hashtag" rel="nofollow noopener" target="_blank">#Voyager</a> <a href="https://mastodon.social/tags/Mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mimas</a>

Phil StookeA quick look at the images: Voyager 1 at the top (14 frames), Voyager 2 at the bottom (6 frames). Voyager 2 doesn't add much, but it adds something. The last 2 images show the night side illuminated (vastly exaggerated here) by light reflected off the planet and its rings, but I can't see any detail in there. The best images are of the southern hemisphere far from the biggest crater. Let's get mapping! <a href="https://mastodon.social/tags/Saturn" class="mention hashtag" rel="nofollow noopener" target="_blank">#Saturn</a> <a href="https://mastodon.social/tags/Voyager" class="mention hashtag" rel="nofollow noopener" target="_blank">#Voyager</a> <a href="https://mastodon.social/tags/Mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mimas</a>

Phil StookeHere is the full set of MImas images. As with other indexes like this which I have made, I'm using multispectral sequences, but not for colour... I use them to make super-resolution images. What's that? The technique is now widely used (e,g astronomical image-stacking, and in planetary applications, combining multiple frames of one scene to increase effective resolution. We'll look at his process later. I was an early user of the method. <a href="https://mastodon.social/tags/Saturn" class="mention hashtag" rel="nofollow noopener" target="_blank">#Saturn</a> <a href="https://mastodon.social/tags/Voyager" class="mention hashtag" rel="nofollow noopener" target="_blank">#Voyager</a> <a href="https://mastodon.social/tags/Mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mimas</a>

Phil StookeNext door to Enceladus is Mimas, the one that looks like the Death Star if you are so minded. Let's start this time with the USGS map. Like their Enceladus map, it has big blank areas, but the situation is different. I said the Enceladus shaded relief map couldn't be extended because you can't see relief in the low resolution areas. That's not the case with Mimas. Let's check the images... <a href="https://mastodon.social/tags/Saturn" class="mention hashtag" rel="nofollow noopener" target="_blank">#Saturn</a> <a href="https://mastodon.social/tags/Voyager" class="mention hashtag" rel="nofollow noopener" target="_blank">#Voyager</a> <a href="https://mastodon.social/tags/Mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mimas</a>

AstronomiemuseumHeute (17.09.2024) vor... ...260 Jahren wurde John Goodricke geboren ...235 Jahren Saturnmond <a href="https://mastodon.social/tags/Mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mimas</a> entdeckt Mehr <a href="https://astronomiemuseum.de/heute-vor" rel="nofollow noopener" translate="no" target="_blank">https://astronomiemuseum.de/heute-vor</a> <a href="https://mastodon.social/tags/Astronomiemuseum" class="mention hashtag" rel="nofollow noopener" target="_blank">#Astronomiemuseum</a>

In Saturn's RingsStill working on restoring the masters. This is a direct screenshot from the film. We are obviously biased, but wow these images are beautiful. Just imagine this on a screen 80 feet wide.<a href="https://mastodon.social/tags/cassinispacecraft" class="mention hashtag" rel="nofollow noopener" target="_blank">#cassinispacecraft</a> <a href="https://mastodon.social/tags/saturn" class="mention hashtag" rel="nofollow noopener" target="_blank">#saturn</a> <a href="https://mastodon.social/tags/mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#mimas</a> <a href="https://mastodon.social/tags/insaturnsrings" class="mention hashtag" rel="nofollow noopener" target="_blank">#insaturnsrings</a>

Daniel FischerThe evolution of a young ocean within Mimas: <a href="https://www.hou.usra.edu/meetings/lpsc2024/pdf/1628.pdf" rel="nofollow noopener" translate="no" target="_blank">https://www.hou.usra.edu/meetings/lpsc2024/pdf/1628.pdf</a> -> Orbital Eccentricity Led to Young Underground Ocean on Saturn Moon <a href="https://scicomm.xyz/tags/Mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mimas</a>: <a href="https://www.psi.edu/blog/orbital-eccentricity-led-to-young-underground-ocean-on-saturn-moon-mimas/" rel="nofollow noopener" translate="no" target="_blank">https://www.psi.edu/blog/orbital-eccentricity-led-to-young-underground-ocean-on-saturn-moon-mimas/</a>

JoachimHeute am Teich in der Stadt einen Lindenschwärmer gefunden -- und mit der Hand "gefangen", also aufgehoben.<a href="https://mastodon.online/tags/Fotografie" class="mention hashtag" rel="nofollow noopener" target="_blank">#Fotografie</a> <a href="https://mastodon.online/tags/Insekten" class="mention hashtag" rel="nofollow noopener" target="_blank">#Insekten</a> <a href="https://mastodon.online/tags/Falter" class="mention hashtag" rel="nofollow noopener" target="_blank">#Falter</a> <a href="https://mastodon.online/tags/Schmetterling" class="mention hashtag" rel="nofollow noopener" target="_blank">#Schmetterling</a> <a href="https://mastodon.online/tags/Mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mimas</a> <a href="https://mastodon.online/tags/Natur" class="mention hashtag" rel="nofollow noopener" target="_blank">#Natur</a> <a href="https://mastodon.online/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#photography</a> <a href="https://mastodon.online/tags/insects" class="mention hashtag" rel="nofollow noopener" target="_blank">#insects</a> <a href="https://mastodon.online/tags/moth" class="mention hashtag" rel="nofollow noopener" target="_blank">#moth</a> <a href="https://mastodon.online/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#nature</a>

Benjamin Carr, Ph.D. 👨🏻‍💻🧬<a href="https://hachyderm.io/tags/Saturn" class="mention hashtag" rel="nofollow noopener" target="_blank">#Saturn</a>’s ‘Death Star’ <a href="https://hachyderm.io/tags/moon" class="mention hashtag" rel="nofollow noopener" target="_blank">#moon</a> has hidden <a href="https://hachyderm.io/tags/ocean" class="mention hashtag" rel="nofollow noopener" target="_blank">#ocean</a> under its crust, say scientists <a href="https://hachyderm.io/tags/Mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mimas</a>, the icy Saturnian moon famed for its resemblance to the Death Star, hides a liquid ocean under its crusty surface. The 250 mile-wide object joins#Titan and <a href="https://hachyderm.io/tags/Enceladus" class="mention hashtag" rel="nofollow noopener" target="_blank">#Enceladus</a> (and <a href="https://hachyderm.io/tags/Jupiter" class="mention hashtag" rel="nofollow noopener" target="_blank">#Jupiter</a>'s <a href="https://hachyderm.io/tags/Europa" class="mention hashtag" rel="nofollow noopener" target="_blank">#Europa</a> and <a href="https://hachyderm.io/tags/Ganymede" class="mention hashtag" rel="nofollow noopener" target="_blank">#Ganymede</a>) in the secret subterranean sea club Calculations suggest a 45-mile-deep internal body of#water lurks beneath Mimas’s 15-mile-thick icy shell <a href="https://www.theguardian.com/science/2024/feb/07/saturn-death-star-moon-mimas-hidden-ocean" rel="nofollow noopener" translate="no" target="_blank">https://www.theguardian.com/science/2024/feb/07/saturn-death-star-moon-mimas-hidden-ocean</a>

Spaceflight 🚀More than 50 per cent 📊 of <a href="https://spacey.space/tags/Mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#Mimas</a>’ volume is taken by liquid water 💦 <a href="https://www.scmp.com/news/china/science/article/3251302/chinese-european-scientists-find-hidden-ocean-saturns-smallest-moon" rel="nofollow noopener" translate="no" target="_blank">https://www.scmp.com/news/china/science/article/3251302/chinese-european-scientists-find-hidden-ocean-saturns-smallest-moon</a><a href="https://spacey.space/tags/Saturn" class="mention hashtag" rel="nofollow noopener" target="_blank">#Saturn</a> <a href="https://spacey.space/tags/Astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#Astronomy</a>

Daniel PomarèdeSpeculative solar system landscapesSaturn from Mimas, by uxmal750ad on DeviantArt<a href="https://deviantart.com/uxmal750ad/art/Saturn-from-Mimas-509495257" rel="nofollow noopener" translate="no" target="_blank">https://deviantart.com/uxmal750ad/art/Saturn-from-Mimas-509495257</a> <a href="https://mastodon.social/tags/spaceart" class="mention hashtag" rel="nofollow noopener" target="_blank">#spaceart</a> <a href="https://mastodon.social/tags/astroart" class="mention hashtag" rel="nofollow noopener" target="_blank">#astroart</a> <a href="https://mastodon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#space</a> <a href="https://mastodon.social/tags/art" class="mention hashtag" rel="nofollow noopener" target="_blank">#art</a> <a href="https://mastodon.social/tags/digitalart" class="mention hashtag" rel="nofollow noopener" target="_blank">#digitalart</a> <a href="https://mastodon.social/tags/DeviantArt" class="mention hashtag" rel="nofollow noopener" target="_blank">#DeviantArt</a> <a href="https://mastodon.social/tags/uxmal750ad" class="mention hashtag" rel="nofollow noopener" target="_blank">#uxmal750ad</a> <a href="https://mastodon.social/tags/artist" class="mention hashtag" rel="nofollow noopener" target="_blank">#artist</a> <a href="https://mastodon.social/tags/digitalartist" class="mention hashtag" rel="nofollow noopener" target="_blank">#digitalartist</a> <a href="https://mastodon.social/tags/mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#mimas</a> <a href="https://mastodon.social/tags/moon" class="mention hashtag" rel="nofollow noopener" target="_blank">#moon</a> <a href="https://mastodon.social/tags/moons" class="mention hashtag" rel="nofollow noopener" target="_blank">#moons</a> <a href="https://mastodon.social/tags/saturn" class="mention hashtag" rel="nofollow noopener" target="_blank">#saturn</a> <a href="https://mastodon.social/tags/planet" class="mention hashtag" rel="nofollow noopener" target="_blank">#planet</a> <a href="https://mastodon.social/tags/rings" class="mention hashtag" rel="nofollow noopener" target="_blank">#rings</a> <a href="https://mastodon.social/tags/crater" class="mention hashtag" rel="nofollow noopener" target="_blank">#crater</a> <a href="https://mastodon.social/tags/craters" class="mention hashtag" rel="nofollow noopener" target="_blank">#craters</a> <a href="https://mastodon.social/tags/milkyway" class="mention hashtag" rel="nofollow noopener" target="_blank">#milkyway</a> <a href="https://mastodon.social/tags/ESO" class="mention hashtag" rel="nofollow noopener" target="_blank">#ESO</a> <a href="https://mastodon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#astronomy</a> <a href="https://mastodon.social/tags/astrophysics" class="mention hashtag" rel="nofollow noopener" target="_blank">#astrophysics</a> <a href="https://mastodon.social/tags/astrodon" class="mention hashtag" rel="nofollow noopener" target="_blank">#astrodon</a> <a href="https://mastodon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#science</a> <a href="https://mastodon.social/tags/solarsystem" class="mention hashtag" rel="nofollow noopener" target="_blank">#solarsystem</a> <a href="https://mastodon.social/tags/universe" class="mention hashtag" rel="nofollow noopener" target="_blank">#universe</a>

Daniel PomarèdeResearchers suggest a global ocean lies 15 miles beneath the surface of Saturn’s moon, Mimas - a shocking discovery that could redefine what a habitable world looks likeGreat paper with plenty of insights by Catherine Duncan for Smithsonian Magazine <a href="https://www.smithsonianmag.com/smart-news/an-icy-moon-of-saturn-may-be-hiding-a-vast-ocean-under-its-crust-surprising-astronomers-180983760/" rel="nofollow noopener" translate="no" target="_blank">https://www.smithsonianmag.com/smart-news/an-icy-moon-of-saturn-may-be-hiding-a-vast-ocean-under-its-crust-surprising-astronomers-180983760/</a><a href="https://mastodon.social/tags/mimas" class="mention hashtag" rel="nofollow noopener" target="_blank">#mimas</a> <a href="https://mastodon.social/tags/ocean" class="mention hashtag" rel="nofollow noopener" target="_blank">#ocean</a> <a href="https://mastodon.social/tags/saturn" class="mention hashtag" rel="nofollow noopener" target="_blank">#saturn</a> <a href="https://mastodon.social/tags/moon" class="mention hashtag" rel="nofollow noopener" target="_blank">#moon</a> <a href="https://mastodon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#space</a> <a href="https://mastodon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#astronomy</a> <a href="https://mastodon.social/tags/astrodon" class="mention hashtag" rel="nofollow noopener" target="_blank">#astrodon</a> <a href="https://mastodon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#physics</a> <a href="https://mastodon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#science</a> <a href="https://mastodon.social/tags/research" class="mention hashtag" rel="nofollow noopener" target="_blank">#research</a> <a href="https://mastodon.social/tags/STEM" class="mention hashtag" rel="nofollow noopener" target="_blank">#STEM</a> <a href="https://mastodon.social/tags/universe" class="mention hashtag" rel="nofollow noopener" target="_blank">#universe</a> <a href="https://mastodon.social/tags/solarsystem" class="mention hashtag" rel="nofollow noopener" target="_blank">#solarsystem</a>

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