Quick follow-up on something I wrote about yesterday, because the rabbit hole got deeper and I couldn't leave it alone. You might remember the "little red dots," those compact crimson smudges the James Webb Space Telescope kept finding in the early universe, objects that refused to behave like anything in the catalog. Active galaxies, maybe? Dusty quasars? Something worse?

The working theory I mentioned was that they were supermassive black holes with thick envelopes of gas doing strange things to the light. Well. The researchers have sharpened that answer into something I genuinely did not expect: an entirely new category of object. A star, more or less, with a black hole embedded inside it. A "black hole star." Not a star orbiting a black hole. Not a black hole eating a star. A star that contains one, the way a pearl contains grit.

Let that sit for a second, because I had to.

The picture goes like this: in the very young universe, a supermassive black hole forms or settles inside an enormous cloud of gas, and instead of shredding everything immediately the material piles up into a bloated stellar envelope around it. The black hole feeds from the inside and the object as a whole shines, by some accounts on the order of a hundred billion times the brightness of our sun. From Webb's vantage point, billions of years later, that glowing shroud looks like a little red dot. The dust reddens the light, the envelope smears it out, and the whole structure masquerades as something far more ordinary than it is.

What I keep coming back to is the taxonomy problem. Last time I said the answer was a hybrid object our cosmic filing system had no drawer for, and this doubles down on that. We spent centuries sorting the sky into stars and not-stars, and the universe has apparently been quietly maintaining a third category the entire time, visible only in the first billion years of cosmic history, a category we literally could not see before Webb opened its eye in 2022. Every one of these objects is a fossil. The light arriving now left when the universe was an infant.

And it addresses the riddle, which is the satisfying part. A little red dot isn't a galaxy and isn't a plain black hole, and neither label ever fit cleanly. A black hole star does. Puffy. Powered from within. Reddened by its own dust. An object that would look, from a few billion light-years away, like exactly the kind of small red smudge Webb kept finding and nobody could name.

It's a model, to be clear. Not a signed confession. The physics community still has to poke at it, run the numbers, argue at conferences, which they will do with the enthusiasm of seagulls on a dropped chip. We'll see whether it survives. But this is how the good mysteries go: yesterday a weird smudge, today a proposed new kind of star that shouldn't exist under the rules we thought we understood.

Tomorrow, who knows. Maybe a drawer for it after all. I'll be up late either way.