The James Webb Space Telescope recently observed two new planets forming around a star in its early stages of life. Both of these planets are bigger than Jupiter and orbit a star in the constellation Musca that is about 310 light-years away. Each one demonstrates a unique stage of growth, offering unique insight into the formation of planetary systems.
Scientists concentrated on YSES-1, a star that is about the size of our Sun but much younger—only 16 million years old. YSES-1 is still young, in contrast to our Sun, which has been around for more than 4.5 billion years. Scientists were surprised to see the 2 planets orbiting it. Despite being part of the same system, they seem to be in different phases of development.
2 Massive Planets, Two Distinct Tales
The inner planet orbits far from its star—160 times farther than the Earth-Sun distance—and has roughly 14 times Jupiter’s mass. It is surrounded by a disc of fine dust. This dusty ring points to a recent collision or a planet that is still forming. It is also possible that a moon is forming around it. In its dense atmosphere, scientists also found water vapour and carbon monoxide.
At a distance 320 times greater than Earth’s orbit, the second planet orbits even further away. This planet, which is about six times as massive as Jupiter, does not have an outer disc. But silicate clouds are present in its atmosphere, indicating that it is different from other planets in our solar system. Methane, carbon monoxide, water, and carbon dioxide were also detected by the Webb Telescope in its atmospheric layers.
Planets in the same system typically form together, according to the study’s lead researcher, Dr. Kielan Hoch of the Space Telescope Science Institute. Hoch clarified, “We expect planets to develop quickly, often within a million years.” “It’s unusual to find two at such different stages.” The mystery is increased by their separation from the star. According to current models, planets form in protoplanetary discs near their stars. That rule is broken by these 2.
More than 5,900 exoplanets have been found by astronomers since the 1990s. Less than 2%, however, have been directly imaged in this way. Catching such planets so early in their formation is even more uncommon. This finding reminds us of how much we still don’t know about the origins of systems like our own and provides a deeper look at the planet formation puzzle.
