Astronomers Discover 'Impossible' Solar System Challenging Planet Formation Theories

• Astronomers identified a distant planetary system, LHS 1903, with an unusual rocky planet orbiting far from its small red star, defying current planet formation theories.
• The European Space Agency's CHEOPS mission and ground telescopes were used to study the system, initially identifying three planets and later a fourth rocky planet furthest from the star.
• This 'inside-out' arrangement (rocky, gaseous, gaseous, rocky) contradicts the traditional theory where rocky planets form closer to the star and gas giants further out.
• Researchers propose a sequential planet formation model, suggesting planets may have formed one by one, with the outer rocky world emerging later in depleted conditions.
• The discovery broadens scientific understanding of planet evolution, prompting a re-evaluation of existing models and questioning the typicality of our own Solar System.