# Rocky planet discovered in outer orbit challenges planet formation theory

**URL:** <https://www.cax.do/t/topic/1073>\
**Category:** News\
**Created:** [2026 年2 月 14 日 14:13 UTC](https://www.cax.do/t/topic/1073 "2026-02-14T14:13:06Z")\
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作者： ![system](https://www.cax.do/uploads/default/original/2X/7/778bde4720104aa3bc077ba8018d2f5e546c3682.png) [@system](https://www.cax.do/u/system)\
发布日期： [2026 年2 月 14 日 14:13 UTC](https://www.cax.do/t/topic/1073/1 "2026-02-14T14:13:06Z")

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Originally published at: [Rocky planet discovered in outer orbit challenges planet formation theory – RSS News](https://rss.cax.do/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.​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. Top Technology News — ScienceDaily​[Read More](https://www.sciencedaily.com/releases/2026/02/260213223857.htm)