The latest news about astronomy, space, and the NASA/ESA Hubble Space Telescope presented in High Definition.
http://www.spacetelescope.org/videos/hubblecast/
Hubblecast 107: Decoding the colours of NGC 3344
Our eyes detect only visible light, but on board Hubble are a variety of instruments that together detect many different wavelengths of light. This means that Hubble is able to observe galaxies over a wide range of wavelengths to reveal features that would otherwise remain invisible to our eyes.