The youngster is less than 3 million years old, and raises questions about how planets form from the cosmos' dusty ether.
The universe is no place for an infant world. As youngins, planets are shrouded by the orbiting disk of material from which they formed, hiding them from view. But a research team’s analysis of a large planet orbiting a 3 million-year-old star offers a rare view of a newly-formed world because, as it turns out, it’s just a big baby., who designated it IRAS 04125+2902 b—a big name for a cute little guy.
Despite being young, it’s still a big boy, about 10 times as wide as Earth with a mass about one-third that of Jupiter. That means it likely has an inflated atmosphere that will shrink over time as it’s still in the process of formation. In time, the planet could become a gaseous mini-Neptune or a rocky super-Earth, according to the paper.by watching for a slight dip in a star’s light as a planet passes in front of it from the observer’s view.
The star system’s misaligned disk remains a mystery. The disks, a rotating swirl of gas and dust that surrounds a newly formed star, usually align with a planet’s orbital plane. The baby planet’s orbit and its host star’s rotation are consistent with edge-on orientations, the team found, but the star system’s disk is tilted at a 30-degree angle. As the odd one out, the disk’s misalignment could be due to material falling from the star-forming region surrounding the system.
The baby planet offers unique insights into the early years of planetary formation, an adorable glimpse of the cosmos that we rarely get to see.The newly identified three-body system has a problem, and it’s not aliens—it’s that in about 20 million years, the stars are expected to merge and explode.Webb data suggests a massive dust cloud observed 20 years ago around Beta Pictoris was caused by a cataclysmic asteroid collision.
Gliese 12 b, a Venus-sized world located just 40 light-years away, presents a promising target for studying planetary atmospheres and potential habitability.
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