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Miranda/Uranus unlikely ocean

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From the «life clinging to yer anus» department:
Title: Miranda’s Unlikely Ocean Has Us Asking If There’s Life Clinging On Around Uranus
Author: Tyler August
Date: Sat, 21 Feb 2026 21:00:24 +0000
Link: https://hackaday.com/2026/02/21/mirandas-unlikely-ocean-has-us-asking-if-theres-life-clinging-on-around-uranus/
Podcast Download URL: https://hackaday.com/wp-content/uploads/2026/02/figure2.jpg?w=186

[image 1]

If you’re interested in extraterrestrial life, these past few years have given
an embarrassment of places to look, even in our own solar system. Mars has been
an obvious choice since before the Space Age; in the orbit of Jupiter, Europa’s
oceans have been of interest since Voyager’s day; the geysers of Enceladus give
Saturn two moons of interest, if you count the possibility of a methane-based
chemistry on Titan. Even faraway Neptune’s giant moon Triton probably has an
ocean layer deep inside. Now the planet Uranus is getting in on the act,
offering its moon Miranda for consideration in a kinda-recent study in the
Planetary Science Journal.[2]

[image 4][4]Miranda and Uranus, the new hot spot for life-hunters. 
Photomontage credit NASA.

Even if you’re into astronomy, it may seem like this is coming out of left
field. “Miranda, really? What new data could we possibly have on a moon of
Uranus nobody’s visited since the 1980s?” Well, none, really. This study relies
on reexamining the data collected during the Voyager 2 encounter and trying to
make sense of the chaotic, icy world that the space probe revealed.

The faults and other features on Miranda indicated it was geologically active
at some point; this study tries to recreate the moon’s history through computer
modelling to find that Miranda probably had a ≥100 km thick ocean sometime in
the last 100-500 million years, and that while some of it has likely frozen
since, tidal heating could very well keep a layer of liquid water within the
moon’s interior. Since the moon itself is only 470 km (290 mi) in diameter, a
100km deep ocean layer would actually be a huge proportion of its volume.
[image 6][6]The model is a fairly simple one, with the ocean sandwiched between
two layers of ice and a rocky core. Image from Caleb Strom et al 2024 Planet.
Sci. J. 5 226

Right now, the over-optimistic thinking is that “water means life”, since
that’s how it seems to work on Earth. It remains to be seen if Miranda, or
indeed any of the icy moons, ever evolved so much as a microbe. Aside from the
supposed presence of liquid dihydrogen monoxide, there’s nothing to suggest
they have. Finding out is going to take a while: even with boots — er, robots —
on the ground, Mars isn’t giving up that secret easily[7]. Still, if we’re able
to discover irrefutable evidence for such extraterrestrial life, it will
provide an important constraint on one term of The Drake Equation:[8] what
fraction of worlds develop life. That by itself won’t tell us “are we alone,”
but it will be interesting.

Of course, even if all these worlds are barren now, they might not be for long,
once our probes start visiting[9].

Story via Earth.com[10]

Header image: Miranda, imaged by Voyager 2. Credit NASA/JPL-Caltech

Links:
[1]: https://hackaday.com/wp-content/uploads/2026/02/20241028-Miranda-Voyager2.jpg?w=800 (image)
[2]: https://iopscience.iop.org/article/10.3847/PSJ/ad77d7 (link)
[3]: https://hackaday.com/wp-content/uploads/2026/02/Montage_of_Uranus_and_Miranda.jpg (link)
[4]: https://hackaday.com/wp-content/uploads/2026/02/Montage_of_Uranus_and_Miranda.jpg?w=189 (image)
[5]: https://hackaday.com/wp-content/uploads/2026/02/figure2.jpg (link)
[6]: https://hackaday.com/wp-content/uploads/2026/02/figure2.jpg?w=186 (image)
[7]: https://hackaday.com/2022/01/27/sherloc-and-the-search-for-life-on-mars/ (link)
[8]: https://hackaday.com/2022/09/09/frank-drakes-legacy-or-are-we-all-alone-in-the-universe/ (link)
[9]: https://hackaday.com/2024/11/27/life-found-on-ryugu-asteroid-sample-but-it-looks-very-familiar/ (link)
[10]: https://www.earth.com/news/uranus-moon-miranda-may-have-hidden-ocean-possibly-extraterrestrial-life/ (link)

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Miranda/Uranus unlikely ocean Retrograde <fungus@amongus.com.invalid> - 2026-02-22 17:03 +0000

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