NASA's Hubble Space Telescope is "on its last legs" after scientists discovered faulty gear while carrying out checks following a computer glitch.Scientists uncovered a safety door that had failed to close and a camera had been taken offline after the IT error saw Hubble enter "safe mode" on Sunday.The space telescope, which has helped find black holes and determine the age of the universe since going into Earth's orbit in 1990, returned to operational mode in the early hours of Friday.Space expert Neel Patel has said the glitch showed the historic telescope was on its "last legs".He wrote in MIT Technology Review: "Sunday’s announcement does once again remind us that Hubble is old!
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