NEWS 🚨: Astronomers just found a planet orbiting its star backwards, and nobody knows how it got that way

Sep 23, 2026 · 12:10 PM UTC

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GJ 3090 b, a Neptune-sized world 73 light-years away, circles its red dwarf in the opposite direction to the star's spin. It's the first backward planet ever found around a small star! More soon here: latestinspace.com 📩
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Replying to @latestinspace
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You are looking at it upside down ? 🤔
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Omg bisexual planet discovered on Celebrate Bisexuality Day!

ALT Happy Celebration GIF by Sigrun

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Replying to @latestinspace
They call these lesbian planets
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Easy. It's being pulled like a comet by it's star, but pulled in another direction by another star farther away. It changes direction but does not leave its parent star that is constantly in motion circling its galaxy.
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I know why. Because it wants to. I'll be waiting for the Nobel prize.
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But why is that backwards just because the only thing humans have seen is the other way?
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Um... the same way some of the moons in our solar system do. Captured by gravity after formation as opposed to being a product of local stellar formation
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A bit misleading. A planet in retrograde happens one of 3 ways, and happens more than you think. 1. Gravitation flip from another close planet, near-star system fly-by, etc. 2. Rogue planet passing by that got too close to a star and fell into its well just right. 3. Rare, but a companion star and tilt or alter the disc, causing it to rotate backwards (though all planets would be affected by this)
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YOU’RE BACKWARDS! Is probably what the planet thinks.
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I made a small 3D model of the planet and its backwards orbit, with Earth next to it for comparison. thought you might like it
Made a model of GJ 3090 b to see what its backwards orbit actually looks like. Added Earth next to it for comparison. You can play with it here: gj3090b.pages.dev/
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Replying to @latestinspace
"Backwards"! 😅🥲
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Replying to @latestinspace
My thesis: Early collisions + orbital backspins.
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I mean the first hypothesis should be that it's an extrasystemic planet that got caught into a stable orbit around the star
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Uh gee George… it’s not rocket science. It was passing through the system until it got caught by the gravitational field of the star causing it to fall into orbit around the star while moving in its original direction of travel. 🤦‍♂️
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Replying to @latestinspace
Something to do with its magnetic core perhaps?
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What if the planet is right and everyone else is backwards?
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You guys remember when you played all those records backwards?? Yeah, see what you did.
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my first educated guess would be that it could be captured free-floating planet from another system
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Turned left onto a one way street.
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A Dark Matter planet, everything is reversed, of course
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you mean captured planets aren't a thing?
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So you pop out of nowhere elderly and age backwards???
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@grok define backwards? Why would it be backwards?
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its giving the ex who still drives past your house at 2am just to feel something
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So what would gravity be like on there? Or would there be any? I’m no rocket scientist but earth spins the other way and we stick to the ground.
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So what defines it as rotating backwards?
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My husband also spins backward, but I still married him.
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I think that looks quite unrealistic and I wonder if the image wasn't edited a lot, since I find the pink color unrealistic... it looks similar to an air swarm of pink.
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Replying to @latestinspace
@grok could the planet be a rogue captured by the star or a moon from a very large planet?
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