8/20/2026
Dark Matter · exoplanets

Mega-Earth GJ 523b is 23 times as massive as our planet—but only 2.5 times as wide

Filed by Dr. Kai Vega
Mega-Earth GJ 523b is 23 times as massive as our planet—but only 2.5 times as wide
It's nearly 170 million years old. It's more than 2.5 times the size of Earth. And it's the first exoplanet discovered and cataloged by researchers with the Wisconsin Center for Origins Research (WiCOR).
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Dr. Kai Vega
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Mega-Earth GJ 523b is 23 times as massive as our planet—but only 2.5 times as wide — Dark Matter