The technical approaching of Spitzer is attached in four
basic physical values that define the importance of IR in the investigation of
astrophysical phenomena. The infrared region is part of the
electromagnetic spectrum and ranges from 1 micron (near infrared) to 200
microns (far infrared). Human eyes are only sensitive to light between 0.4
and 0.7 microns.
Infrared observations
expose cool state of matter.
Solid objects in space - from the size of a grain of
interstellar dust (less than a micron) to the giant planets - have temperatures
ranging from 3 to 1500 degrees Kelvin (K).
