Astronomers recently discovered a hefty exoplanet orbiting a star similar to our sun, and it has researchers puzzled due to its tremendous density.
Astronomers recently discovered a hefty exoplanet orbiting a star similar to our sun. At just 15 million years old, this chunky planet is a baby by galactic standards, old, but it has researchers puzzled due to its tremendous density.
If the mass measurements of this planet are correct, that would make it twice as dense as Earth — and Earth is already a dense planet, being a rocky type with a metal core. It could be that because the planet is so young, there is something about the way gas giants form that we are not yet aware of. The first approach to how planets might form is called core accretion, in which a small core attracts other particles, which collide and stick to it until it becomes the starting point of a planet. The second theory is called disk instability, in which there is a disk of matter that cools and then splits into planet-sized chunks.
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