NASA Goddard Space Flight Center scientists have created a new material that is ten times blacker than the blackest black paint in the world. It's made of carbon nanotubes grown on titanium. Why does NASA need this material?
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Once it goes through some manufacturing fine-tuning, the new material will be used to coat the guts of cameras and telescopes in space. Right now, these instruments use NASA's Z306 paint, a pitch black painting that reduces photon contamination by absorbing errant light. According to NASA, this light "has a funny way of ricocheting off instrument components and contaminating measurements."
GizModo (http://gizmodo.com/5706700/why-did-nasa-create-a-material-ten-times-blacker-than-the-blackest-black-paint)