Peering deep into the heart of the Milky Way ? about 5,500 light years from Earth ? the European Southern Observatory?s Wide Field Imager (WFI) combined images taken through red, green and blue filters, as well one designed to pick up the light of glowing hydrogen. The light appears red because blue and green lights are more effectively absorbed or deflected by materials between Earth and the Nebula.
But perhaps the most interesting element of this image of the Cat?s Paw is what you can?t see: the clouds of hydrogen and other celestial materials are believed to be hiding many baby stars, not yet intense enough to be visible. Perhaps if you look really closely at the hi-res version, you can find one.
[ESO]
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