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New modeling shows that there likely is an ocean layer in four of Uranus’ major moons: Ariel, Umbriel, Titania, and Oberon. Salty – or briny – oceans lie under the ice and atop layers of water-rich rock and dry rock. Miranda is too small to retain enough heat for an ocean layer. Credit: NASA/JPL-Caltech

Uranus Moons Hide Watery Secrets

Illustration: Bibiana Prinoth

Scientists discover rare element terbium in exoplanet’s atmosphere

A big ol explosion somewhere out there

Scientists observe flattest explosion ever seen in space

Part of the set-up for creating medium-density amorphous ice

Discovery of new ice may change understanding of water

Mimas’ heavily cratered surface (left) suggests a cold history, but its librations rule out a homogeneous interior. Rather, Mimas must have a rocky interior and outer hydrosphere, which could include a liquid ocean (Option A) or be fully frozen with an irregularly shaped core (Option B). An ocean provides a better fit to the phase of the libration but is difficult to reconcile with Mimas’ geology.

More evidence that Saturn’s moon Mimas is a stealth ocean world

Asteroid Itokawa

Nukes needed to save Earth from common killer asteroid

This artist’s conception shows a late-stage galaxy merger and its two newly-discovered central black holes. The binary black holes are the closest together ever observed in multiple wavelengths.

Doomed pair of supermassive black holes the closest to collision ever seen

The power of JWST to map galaxies at high resolution and at longer infrared wavelengths than Hubble allows it look through dust and unveil the underlying structure and mass of distant galaxies. This can be seen in these two images of the galaxy EGS23205, seen as it was about 11 billion years ago. In the HST image (left, taken in the near-infrared filter), the galaxy is little more than a disk-shaped smudge obscured by dust and impacted by the glare of young stars, but in the corresponding JWST mid-infrared image (taken this past summer), it’s a beautiful spiral galaxy with a clear stellar bar.

Milky Way-like galaxies found in young universe

Series Title: Algorithms for Construction of Reality in Physics - Vol. 2 Schrödinger’s Cat Smile Volume 2

All in our heads? Physics book calls for better description of reality

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