Exoplanet Radio - Ep. 22: HAT-P-67b: The Largest Known Exoplanet

The 365 Days of Astronomy

From August 17, 2023.

According to the NASA exoplanet archive, HAT-P-67 b holds the distinction of being the largest exoplanet in terms of size. With exoplanet classification, one always needs to be careful - especially when it comes to size and mass - because there is a fuzzy boundary with large planets where if they become too large, they are considered a brown dwarf star. This is a body that almost made it to star status but doesn’t have enough mass or material for nuclear fusion to take place.

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