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Astronomers discovered a planetary system around the red dwarf star LHS 1903, located approximately 116 light-years away, that contains four planets with an unusual arrangement of rocky and gaseous worlds that challenges traditional planet formation models.

Astronomers discovered a planetary system around the red dwarf star LHS 1903, located approximately 116 light-years away, that contains four planets with an unusual arrangement of rocky and gaseous worlds that challenges traditional planet formation models.

The planetary system includes one rocky planet orbiting close to the star, followed by two gas giants, and then a fourth rocky planet at the outer edge, creating what researchers describe as an inside-out configuration that defies typical expectations.

The planetary system includes one rocky planet orbiting close to the star, followed by two gas giants, and then a fourth rocky planet at the outer edge, creating what researchers describe as an inside-out configuration that defies typical expectations.

Traditional models suggest rocky planets form near stars because stellar radiation removes gaseous atmospheres, while gas giants develop in cooler outer regions where gas can accumulate, yet LHS 1903's outermost planet appears rocky without a gaseous envelope.

Traditional models suggest rocky planets form near stars because stellar radiation removes gaseous atmospheres, while gas giants develop in cooler outer regions where gas can accumulate, yet LHS 1903's outermost planet appears rocky without a gaseous envelope.

The research team, led by Dr. Thomas Wilson from the University of Warwick, found evidence suggesting the planets formed sequentially through inside-out planet formation rather than simultaneously from a protoplanetary disc.

The research team, led by Dr. Thomas Wilson from the University of Warwick, found evidence suggesting the planets formed sequentially through inside-out planet formation rather than simultaneously from a protoplanetary disc.

Scientists determined that by the time the fourth outer planet formed, the system may have depleted its gas supply, resulting in a small rocky world that formed in what researchers call a gas-depleted environment, marking the first evidence of such formation.

Scientists determined that by the time the fourth outer planet formed, the system may have depleted its gas supply, resulting in a small rocky world that formed in what researchers call a gas-depleted environment, marking the first evidence of such formation.

Isabel Rebollido, a Research Fellow at the European Space Agency, noted that as astronomers observe more diverse exoplanet systems, they are beginning to revisit planet formation theories that were historically based on our Solar System.

Isabel Rebollido, a Research Fellow at the European Space Agency, noted that as astronomers observe more diverse exoplanet systems, they are beginning to revisit planet formation theories that were historically based on our Solar System.

Unusual Planet System Challenges Formation Theories

Unusual Planet System Challenges Formation Theories

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Unusual Planet System Challenges Formation Theories

Unusual Planet System Challenges Formation Theories

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