TOI-561 is a star located 280.5 light years away from the Earth in the constellation of Sextans. It is estimated to be 10 billion years old and has the mass and size of about 80% that of the Sun. It belongs to a rare population of stars called Galactic thick disc stars, known for having fewer heavy metals like iron or magnesium. It hosts at least three small transiting planets – TOI-561b, c and d. This is one of the oldest metal-poor planetary system to be discovered in the Milky Way.

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