Exploring a Hot, Young World

The Closest and Youngest Earth-sized Planet Discovered

In a groundbreaking discovery, astronomers have identified an Earth-sized planet closer and younger than any previously known. Positioned remarkably close to both our planet (73 light-years away) and a Sun-like star, this newly found world offers a unique opportunity for scientists to study the evolution of planets. Catalogued as HD 63433 d, this hot exoplanet orbits its star in 4.2 days, making it one of the closest orbiting Earth-sized worlds. With its young age and proximity, HD 63433 d promises invaluable insights into planetary formation and evolution, unlocking mysteries about the processes shaping worlds beyond our own. A paper detailing the planet and its discovery was recently published in The Astronomical Journal.

Senior planetary astronomer Franck Marchis speaks with lead authors Melinda Soares-Furtado and Benjamin Capistrant about this amazing discovery and the implications for planetary formation studies.

Press release: https://news.wisc.edu/earth-sized-planet-discovered-in-our-solar-backyard/
Paper: https://iopscience.iop.org/article/10.3847/1538-3881/ad1039

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