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Astronomers have unveiled the discovery of two Earth-sized exoplanets orbiting a star more than 40 light-years from our planet, marking a significant milestone in the ongoing quest to identify potentially habitable worlds beyond our solar system.
A team of researchers have outlined their findings in a paper published on the pre-print server arXiv and shared by phys.org.
The star, HD 101581, also catalogued as GJ 435, is a K5V-type orange dwarf star located about 42 light years away.
The two confirmed exoplanets, designated HD 101581 b and HD 101581 c, were identified through meticulous observations using NASA 's Transiting Exoplanet Survey Satellite (TESS) during its 63rd and 64th observation sectors.
These planets exhibit radii comparable to Earth's, with HD 101581 b measuring approximately 0.956 times Earth's radius and HD 101581 c about 0.990 times. Their orbital periods are notably brief, with HD 101581 b completing a revolution around its host star every 4.47 days and HD 101581 c every 6.21 days.
Additionally, a third candidate planet, HD 101581 d, has been detected, though its existence awaits further confirmation. If validated, this planet would also be Earth-sized, with an orbital period of approximately 7.9 days.
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