written by nell greenfieldboyce, on december 2nd, 2021

what: astronomers find a new planet that’s mostly made of iron

when: study published december 2nd, 2021

who/where: kristine lam, a researcher at the institute of planetary research in the german aerospace center in berlin

joshua winn, an astronomer at princeton university

interesting fact: this new planet orbits its sun in 8 earth hours

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