Astronomers discover TOI-5734 b, a hot sub-Neptune twice Earth's size

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Mar 4, 2026 - 21:35

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Astronomers discover TOI-5734 b, a hot sub-Neptune twice Earth's size

Using the Transiting Exoplanet Survey Satellite (TESS) and High Accuracy Radial velocity Planet Searcher for the Northern Hemisphere (HARPS-N), an international team of astronomers has discovered a hot sub-Neptune exoplanet orbiting a nearby star. The newfound alien world, designated TOI-5734 b, is about two times larger and nine times more massive than Earth. The discovery was presented in a research paper published February 20 on the arXiv pre-print server.