New Observations Reveal Insights into the TOI-396 Three-Planet System An international team has studied a planetary system containing three exo planets orbiting the star TOI-396. This groundbreaking research, published on November 22 on the pre- print server arXiv, offers the first mass measurements for these planets, enriching the understanding of the system's pro perties. Overview of the TOI-396 Star System Star Pro perties and Location TOI-396 (HR 858 A), located about 103 light-years from Earth, is a bright star of s pectral ty pe F6 V. It has a size 26% larger and a mass 20% greater than the sun, an effective tem perature of 6,354 K, and an estimated ago of two billion years. It is part of a binary system with a faint M dwarf com panion, HR 858 B. Exo planet Discovery via NASA's TESS In 2019, NASA's Transiting Exo planet Survey Satellite (TESS) identified three exo planets orbiting TOI-396, designated TOI-396 b, c, and d. Each of these planets,...
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