In order to appreciate the full resolution of the Planck data, this card would have to be the size of a poster.

The COBE, WMAP, and Planck observations of the microwave sky have progressively improved our understanding of detailed composition and structure of our universe. How many space missions have studied the cosmic microwave background? The first space mission specifically designed to study the cosmic microwave background (CMB) was the Cosmic Background Explorer (COBE), launched by NASA in 1989. CMB as seen by Planck and WMAP .