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Space Photos of the Week: Reading the Universe in Infrared
The human eye can process light wavelengths in the range of 380 to 740 nanometers. However, there is a whole lot of "light" that we cannot see. Cancel the fantastic telescopes! This week we will look at images of space that is filtered for the infrared spectrum – wavelengths of 700 nanometers to 1 millimeter. By filtering for infrared scientists are able to look through the visible things that enter the path, such as gas and dust and other materials, to see the heat, and there are many hot things in the space. This is why NASA has telescopes like Spitzer that orbit the Earth, looking at the infrared universe, showing us things that our distraught eyes could never see on their own.