Elias 2-24 b is the youngest known planet, providing valuable evidence about planetary formation, early accretion and evolving protoplanetary disks.

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• Astronomers confirmed Elias 2-24 b as the youngest known planet, with an estimated age of less than 1 million years.
• The planet orbits Elias 2-24, a young star located approximately 450 light-years from Earth within a planet-forming environment.
• Elias 2-24 b has a mass comparable to Jupiter and remains embedded in the dusty gas-and-debris disk surrounding its host star.
• Researchers identified the planet within a prominent gap in the protoplanetary disk, indicating changes associated with ongoing planetary formation.
• The planet is still accreting material from its surrounding disk, allowing scientists to examine planetary growth during its earliest evolutionary stages.
• Protoplanetary disks contain rotating gas, dust and debris around young stars, providing the environment where planets form and develop.
• Confirmation involved observations and archival data from the W. M. Keck Observatory in Hawaii and other major astronomical facilities.
• Researchers also used the Atacama Large Millimeter/submillimeter Array in Chile to study the planet and its surrounding disk.
• Observations from the European Southern Observatory’s Very Large Telescope provided additional evidence supporting the planet’s confirmation and characteristics.
• Planets younger than 1 million years are rarely observed, making Elias 2-24 b significant for early planetary formation research.
• The discovery provides an important observational reference for studying how gas giant planets form and accumulate material around young stars.
• Continued observations could help researchers understand interactions between newly formed planets and the circumstellar disks from which they emerge.