The Planck spacecraft has delivered quite a payload of preliminary data on the origins of our Universe, and now the European Space Agency (ESA) is letting us catch a glimpse of Planck’s bounty. Named for German physicist and Nobel laureate Max Planck, the ESA launched Planck in May 2009 from the Guiana Space Centre. The spacecraft settled into a stable orbit along Earth’s nightside in a few months later. Earth’s nightside is an ideal spot for space-bound observatories: permanently shielded from the sun, spacecraft have an unobstructed view of the visible cosmos.
At the end of last summer, Planck began its ambitious mission: a survey of the entire sky. But Planck’s mission isn’t a simple pictorial survey (we’ve done that before). Planck was launched to survey the sky for wavelengths of the electromagnetic spectrum that we can’t see. Microwaves and very far infrared have longer wavelengths than visible light (see figure below), and Planck is capturing those wavelengths in its survey of the visible Universe.
It took the Planck spacecraft a little over six months to complete its first microwave and very far infrared survey of the sky, and made use of instruments designed and built by both the ESA and NASA. The embedded videos below illustrated how Planck completed this survey.
The fruits of Planck’s labor are shown below, in the spacecraft’s first microwave and very far infrared image of the sky: