Astronomers have successfully confirmed the detection of the youngest planet, which is still in the early stages of its formation. This exoplanet, named Elias 2-24 b, is less than a million years old and is located approximately 450 light-years from Earth. For comparison, our own planet is about 4.6 billion years old.
This discovery provides scientists with an extremely rare opportunity to study the very initial stages of planetary formation. Elias 2-24 b orbits a young star surrounded by a disk of gas and dust remaining from star formation. About ten years ago, astronomers noticed a gap in this disk, which indicated a possible carving of material by the young planet.
Confirming the existence of the planet was a complex task. Researchers reanalyzed data obtained using the W.M. Keck Observatory in Hawaii in 2018 and 2020. By comparing the faint object based on these two series of observations, they were able to confirm that it moves with its parent star and is not just a distant background object.
It turned out that Elias 2-24 b is a planet, and a rather large one at that. Estimates suggest its mass is between 1.9 and four Jupiter masses, despite its age being only a tiny fraction of Earth's age. The planet orbits its star at a distance approximately 55 times greater than the distance between the Earth and the Sun.
The situation becomes particularly interesting because it is believed that giant planets form through the accumulation of material from the disks surrounding young stars. However, traditional models suggest that creating a Jupiter-sized planet can take several million years. Elias 2-24 b appears to have achieved this much faster.
The existence of this planet suggests that giant planets are capable of forming and growing significantly faster than scientists previously thought, especially at greater distances from their stars. In the future, NASA's Nancy Grace Roman Space Telescope is intended to assist astronomers in studying faint objects around stars, which could potentially reveal more planets hidden in dusty environments where planetary systems are born.
Currently, Elias 2-24 b offers something exceptional: a chance to see a planet shortly after its beginning. It is a reminder that when we look into space, we do not always observe completed worlds; sometimes we catch them in the process of becoming.