Evidence Grows for a Young Subsurface Ocean on Saturn’s Moon Mimas
Recent research presents strong evidence for the existence of a young, subsurface ocean beneath the icy crust of Saturn's moon Mimas. Unlike other ocean-bearing moons like Enceladus and Europa, Mimas lacks surface cracks or signs of activity, making it a unique case. Data from NASA's Cassini spacecr... [More info]
Evidence Builds for a Recent Subsurface Ocean on Saturn's Moon Mimas
Recent research strongly supports the existence of a relatively young subsurface ocean beneath the icy crust of Saturn's moon Mimas. Observations indicate that Mimas' surface, although heavily cratered and seemingly inactive, hides a global ocean beneath 12 to 19 miles (20 to 30 kilometers) of ice. ... [More info]
In this video I am comparing:
The Conklin Duragraph with Diamine Walnut ink
The Just Turnings Mimas with Colorverse Milky Way ink.
The Retro51 Tornado with Diamine Raspberry Rose ink.
Which pen will come out on top?
#fountainpens #fountainpen #penreview #writing #Conklin #Duragraph #Diamine #DiamineInkvent #inkvent #JustTurnings #JustTurningMimas #JustTurning #Mimas #Colorverse #ColorverseColorvent #Colorvent #retro51 #retro51
Check out Saturn's fascinating moon, Mimas! Often called the "Death Star Moon" due to its massive Herschel Crater. 🪐
This giant impact crater is ~130 km wide, spanning nearly a third of the moon's total diameter (~396 km). An incredible feature sculpted by cosmic collision!
#Mimas #Saturn #Astronomy #Space #HerschelCrater #DeathStar #Moons #SolarSystem #Astrodon #SciComm #andor #starwars
#Mimas is a moon of #Saturn that is covered in craters. It is the smallest of Saturn's major moons and is also known as Saturn I.
Mimas was discovered by William Herschel on September 17, 1789.
Mimas is the smallest astronomical body known to be roughly rounded in shape due to its own gravity.
#PhotoOfTheDay: #Mimas: Small #Moon with a Big #Crater
Whatever hit Mimas nearly destroyed it. What remains is one of the largest impact craters on one of Saturn's smallest round moons. Analysis indicates that a slightly larger impact would have destroyed Mimas entirely.
The huge crater, named #Herschel, spans about 130 kilometers and is featured here.
#Mimas: Small #Moon with a Big #Crater
#Astronomy #Picture of the Day
Mars2020 - Sol 1358 - MastCam-Z 🪐
#atlas #cassini #enceladus #mars #mars2020 #mastcamz #mimas #navcam
⏩ 8 new pictures from @kevinmgill https://commons.wikimedia.org/wiki/Special:ListFiles?limit=8&user=OptimusPrimeBot&ilshowall=1&offset=20241221110335
In 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.
#fountainpens #fountainpen #penreview #writing #JustTurningsMimas #JustTurnings #Mimas #handmade #turnedpen #handturned #handturned #turned #DiamineVintageCopper #InkventVintageCopper #Diamine
Here 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. #maps #Saturn #Voyager #Mimas
At 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:
https://www.jpl.nasa.gov/images/pia17214-mimas-global-map-june-2017/
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. #Saturn #Voyager #Mimas
The same for Voyager 2. Those rather unpromising images actually do have some details to add in the northern hemisphere. Tomorrow - putting it all together. #Saturn #Voyager #Mimas
Enough 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. #Saturn #Voyager #Mimas
Putting 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. #Saturn #Voyager #Mimas
Let'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. #Saturn #Voyager #Mimas
A 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! #Saturn #Voyager #Mimas
Here 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. #Saturn #Voyager #Mimas
Next 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... #Saturn #Voyager #Mimas
#Ciencia🔴Estrella de la muerte o luna candidata a albergar vida: así es #Mimas, el satélite de #Saturno
Lea aquí https://www.xataka.com/espacio/estrella-muerte-luna-candidata-a-albergar-vida-asi-mimas-satelite-saturno
