Astronomers have found an abnormally light Jupiter: scientists have two hypotheses of its origin

Using NASA's Transiting Exoplanet Survey Satellite (TESS), an international team of astronomers

discovered a new world the size of Jupiter. It was named TOI-3757 b. This object is slightly larger than our gas giant, but three times lighter than the largest planet in the solar system.

The radius of TOI-3757 b is about 1.09 radiiJupiter, and its mass is approximately 0.268 times that of the gas giant. The object's density is only 0.27 g/cm³. This makes it the lowest-density planet orbiting a red dwarf star. The exoplanet orbits its host every 3.44 days at a distance of about 0.038 AU. from the star. The equilibrium temperature of this alien world is estimated at 759 K. It is located at a distance of 578 light years from Earth.

Trying to explain the low density of TOI-3757 b,The authors of the article offer two most plausible hypotheses. It is possible that the low metallicity of the host star caused a delay in gas accretion before the protoplanetary disk dissipated and made TOI-3757 b so light. Or the low density appeared due to a special mechanism of evolution and tidal heating of the object.

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A red dwarf is a small and relatively cold main sequence star.