Why Are Interstellar Comets So Weird? Part 4: We Finally Turned On the Porch Lights

Credit: NSF–DOE Vera C. Rubin Observatory/NOIRLab/AURA/H. Stockebrand

So that’s all nice. But why now?

That’s the question everyone asks. We went decades — centuries, millennia really — without seeing a single rock that didn’t have a “Made in the Solar System” sticker on it. Then, in the span of less than ten years, we get the Big Three: ‘Oumuamua, Borisov, and now 3I/ATLAS.

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