One of the best meteor showers of the year puts on a fine display in 2023.
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About 8-11 billion years ago, a dwarf galaxy merged with the Milky Way, adding 50 billion solar masses of stars, gas, and dark matter. The object is known as the "Gaia Sausage" because of the extended stream of stars found using ESA's Gaia mission. Astronomers think the Milky Way's central bar formed roughly the same time as the merger. A new paper suggests that merging with the Gaia Sausage triggers the formation of the Milky Way's bar and the build-up of its disk.
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Famous Halley's Comet reaches a distant milestone this coming weekend.
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Researchers using TESS and Cheops data found a system with six sub-Neptune-sized planets, all orbiting in direct resonance with each other.
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Two astronomers use a pioneering method to suggest that the size of our Sun and the solar radius may be due revision.
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