Infrared radiation is used by astronomers to observe stars and nebulas that are invisible in ordinary light or that emit radiation in the infrared portion of the spectrum. An opaque filter, that only lets infrared radiation go through, is used for very precise infrared photographs. However a standard orange or light-red filter, which absorbs blue and violet light, is usually adequate for most infrared pictures. Other types of electromagnetic waves used to picture the Milky Way are pictured below. Of all of the views that we get of the Milky Way, it seems that Infrared radiation gives us the best view.
Most people know Infrared as heat.
Once we can get outside the earth's atmosphere we can detect the infrared radiation coming from Space and get a better picture of the Milky Way and various other parts of the Universe. It provided astronomers with a lot of information, which is still being sorted through today. Through IRAS we have learned a lot about the Milky Way and the Universe in which we live. Their discoveries and uses in Astronomy One satellite which we gained some information is the COBE satellite. The COBE satellite took pictures of the Milky Way including a Near-Infared image of the Milky Way.