GJ 504b, a pink planet with the same size as Jupiter but four times its mass, orbits nine times farther from its star than Jupiter does from the Sun, challenging both core accretion and disk instability theories of gas giant formation and suggesting it may actually be a brown dwarf rather than a planet.
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The Pink Planet That Broke Science π©· GJ 504b Challenges Everything We Know | Space Mystery #nasaAdded:
Have you ever seen a pink planet? The surface of this planet called GJ 504b is entirely pink.
Interestingly, while GJ 504b is about the same size as Jupiter, its mass is four times greater.
Furthermore, its orbit is nine times farther from its host star GJ 504 than Jupiter is from the Sun.
This poses a major challenge to our current theories on how gas giants form.
Previously, scientists believed that gas giants like Jupiter formed at distances from their host stars roughly 50 times the distance from Earth to the Sun.
Because only at such distances could a small rocky core form, which would then rapidly accrete surrounding gas under strong gravity to form a gas giant. This is the core accretion theory. Some also believe that gas giants accumulate their mass and density through a unique cluster structure, a theory known as disk instability.
Generally speaking, before the discovery of GJ 504b, scientists' understanding of gas giant formation mostly relied on these two theories.
The appearance of GJ 504b completely shattered scientists' previous understanding of gas giants.
And the reason for this might be that GJ 504b is not a planet at all, but potentially a brown dwarf.
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