Skywatch

  • October 29, 2009

    Episode 245: Hubble Restored

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    In September, NASA declared the Hubble Space Telescope back in full working order. All the instruments are in excellent shape after being checked out and calibrated. The new instruments are the Wide Field Camera 3 (WFC3), which can see wavelengths ranging from the optical into the infrared, and the Cosmic Origins Spectrograph (COS), which studies the ultraviolet. The Advanced Camera for Surveys (ACS), which had partially stopped working, has new circuitry and functioning as well as ever. The Space Telescope Imaging Spectrograph (STIS), which was also in need of repairs, is now back on the job.