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NASA's exoplanet mission accidentally discovers a world it was never meant to find
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NASA's exoplanet mission accidentally discovers a world it was never meant to find

So here's the thing - NASA's TESS satellite, launched in 2018 to spot nearby planets using the transit method, has now revealed something completely unexpected. Researchers discovered that TESS captured signals from Gaia23bra b, a planet orbiting a star nearly 40,000 light-years away - way beyond TESS's intended range - using gravitational microlensing, a technique nobody expected it to detect. The discovery happened because TESS happened to be observing the same patch of sky when the European Space Agency's Gaia spacecraft detected a microlensing event in April 2023, and TESS's dense observations revealed the planetary signal that Gaia's sparse data had missed. What excites me most is that this suggests there could be many more hidden microlensing planets lurking unnoticed in TESS's archives, waiting for researchers to connect the dots.
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