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Bluesky seems to be having another growth spurt. Anyone else seeing it?

The inner moons of Neptune look like they were turned inside out, with deep-interior minerals spattered across their surfaces. Probably these moons are the shattered remains of earlier satellites that were shredded when a Pluto-like object came barreling in. 🧪🔭 www.caltech.edu/about/news/n...

Legend has it that the Pythagoreans murdered the man who discovered that the diagonal of a unit square is an irrational number, upsetting their mathematical philosophy.

The mission to rescue the Swift Observatory is experiencing technical problems. They may be solvable, but it's a nail-biter. Unclear if the observatory will survive. 🧪🔭 arstechnica.com/space/2026/0...

I appreciate the creative use of units here to call attention to a growing problem: The amount of junk in Earth orbit is now equivalent to 13 million adult cane toads. 🧪

Not a splashy mission, but a technically significant one: the upcoming CAPSTONE 02 spacecraft pair will test autonomous navigation, rendezvous, and formation flying around the Moon. 🧪🔭 www.nasa.gov/directorates...

Early cartographers depicted Earth as seen from the outside. Then astronomers plotted the solar system as seen from the outside. Now, with data from JWST, we can map the *universe* as seen from the outside, across 30 billion light years (in modern coordinates)! 🧪🔭 news.ucr.edu/articles/202...

It's a "maxi-moon." It's a "planet-planet." It's an "exosatellite." A newfound Jupiter-size object orbits a brown dwarf (halfway between a planet and a star), which in turn orbits a star. So what do you call this object? It's a remarkable discovery, by any name. 🔭🧪 www.eso.org/public/news/...

It's hard to know yourself from the inside. Astronomers are still figuring out what our home galaxy looks like; a new study reveals updated locations for the Milky Way's spiral arms. This is where we are. 🧪🔭 www.esa.int/Science_Expl...

The very first image from the surface of Mars, transmitted to Earth from NASA's Viking 1 lander, 50 years ago today. 🧪🔭 www.nasa.gov/image-articl...

Out: Messi In: Messier www.lindahall.org/about/news/s... 🔭🧪

A rich fossil site in China is filling in the little-known transitional details of life before the Cambrian explosion. It documents the emergence of bilateral symmetry & pushes back the origin of the ancestors of all modern vertebrates. 🔭🧪 www.ox.ac.uk/news/2026-04...

Very exciting! First clear detection of an atmosphere around an Earth-size planet in the habitable zone of another star. This is a big step forward in figuring out if "potentially habitable" planets are actually habitable & if red dwarf stars could sustain life. 🧪🔭 www.science.org/content/arti...

It boggles my brain that the coldest place in all of known outer space is sitting in a box on the International Space Station, where temperatures go as low as 1/20,000,000,000th of a degree above absolute zero. And NASA's Cold Atom Lab just got an upgrade. 🧪🔭 www.techtimes.com/articles/318...

For the first time, astronomers have detected sugar molecules (erythrulose, to be precise) in deep space, floating near the center of our galaxy. It adds to the evidence for complex prebiotic carbon chemistry in interstellar clouds, even before planets form. 🧪🔭 cen.acs.org/physical-che...

Five years ago, an experiment at the south pole detected a neutrino 500 trillion times as energetic as visible light. Now we've spotted the likely source: the "Shadow Blaster" galaxy, a staggering 11 billion light years away. 🔭🧪 noirlab.edu/public/news/...

A supernova marks the death of a star. But in the case of supernova AT2025ulz, it seems a star died twice. A massive star exploded. Its dense, spinning remains then clumped into two neutron stars, like newborn planets, which collided & exploded again. Wild! 🧪🔭 keckobservatory.org/superkilonova/

Centaurus A is the quintessential "peculiar" galaxy. It's a powerful source of radio & x-rays. It looks like two galaxies that smashed into each other. I stared at photos of it for years, wondering what was going on. Now observations from JWST are providing answers. 🧪🔭 esawebb.org/news/weic2615/