A NASA craft called WMAP had carried out a similar mission between 2001 and 2010. However, Planck's results had 2.5 times better resolution than WMAP. This produced a shaper map and revealed more details about the Universe. Planck's precise measurements helped define the average density of matter and dark matter in the Universe. It also suggested that the Universe is older than previously thought.
As well as making a map of the CMB, Planck:
- Created a catalogue of galaxy clusters.
- Observed quasars and dusty galaxies.
- Observed the Milky Way and its magnetic field.
- Studied the Solar System's planets, asteroids, and comets.