The past according to Planck: Cosmologists got a lot right
New analysis of universe’s beginning also confirms that puzzles remain
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/02/ag_plank-zoom_free.jpg?fit=860%2C460&ssl=1)
PRIMORDIAL SWIRL The patterns and colors in this visualization represent the polarization and temperature of the cosmic microwave background in a small patch of space, emitted when the universe was about 380,000 years old. The Planck mission released a new map encompassing four years of data on this primordial light.
Planck Collaboration/ESA