Rocky planet discovered in outer orbit challenges planet formation theory - The Fact Factory

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Saturday, 14 February 2026

Rocky planet discovered in outer orbit challenges planet formation theory

Astronomers have uncovered a distant planetary system that flips a long-standing rule of planet formation on its head. Around the small red dwarf star LHS 1903, scientists expected to find rocky planets close in and gas giants farther out — the same pattern seen in our own Solar System and hundreds of others. And at first, that’s exactly what they saw. But new observations revealed a surprise: the outermost planet appears to be rocky, not gaseous.

source https://www.sciencedaily.com/releases/2026/02/260213223857.htm

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