John Grunsfeld, associate administrator, Science Mission Directorate, NASA, speaks at the Hubble 25th Anniversary official image debut event on Thursday, April 23, 2015 at the Newseum in Washington, DC. The official image from Hubble's near-infrared Wide Field Camera 3 is of a two million year old cluster of about 3,000 stars called Westerlund 2, named after the astronomer who discovered it in the 1960s. Westerlund 2 is located in the constellation Carina about 20,000 light-years away from Earth.

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