<http://schema.org/alternativeHeadline>
"Hubble's photographs are actually in black and white when they're beamed back to Earth. So where do the colors come from, and what do they mean?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/space/stories/the-secret-behind-the-hubble-telescopes-stunning-pictures>