The pictures were snapped with the two infrared channels that still work at Spitzer's still-quite-chilly temperature of 30 Kelvin (about minus 406 degrees Fahrenheit). The two infrared channels are part of Spitzer's infrared array camera: 3.6-micron light is blue and 4.5-micron light is orange.
The companies want to put a 2-meter radio antenna along with a smaller optical telescope on a lunar peak, most likely the 5-km-high rim of a crater called Malapert. From this position, both telescopes could view the center of our Milky Way galaxy with unprecedented clarity because they wouldn't be subjected to our atmosphere's hazy interference. The moon would also block them from radio and other electromagnetic noise created by modern civilization. Astronomers have long proposed putting similar telescopes on the moon's far side – which faces permanently away from our planet – because the pictures could exceed anything produced by the best terrestrial or even space-based instruments.