Revealing the Cosmic Microwave Background with Planck
This animation illustrates the painstaking work performed by cosmologists in the Planck Collaboration to extract the Cosmic Microwave Background from the data collected by Planck. The first image in the sequence shows the sources of emission detected on the whole sky at the microwave and sub-millimetre wavelengths probed by Planck, which range from 11.1 mm to 0.3 mm (corresponding to frequencies between 27 GHz and 1 THz).
The different sources of emission include:
The cosmologists had to remove all possible contamination due to emission by foreground sources before they could fully explore the Cosmic Microwave Background data and compare them to cosmological models.