Spitzer

April 24 will mark a significant milestone in the life of one of mankind's greatest scientific instruments – the 25-year anniversary of the launch of the Hubble Space Telescope. Join us as we celebrate the history and achievements of the telescope that inspired a generation.

Infrared observation by the Spitzer space telescope have allowed astronomers to determine the most accurate and precise estimate to date of the Hubble constant - the rate at which our Universe is expanding.