The Early Universe
The Planck mission released a first glimpse of data that, later this year, will test BICEP2’s discovery of gravitational waves.
The Cosmic Microwave Background, leftover light from the big bang, carries a wealth of information about the universe—for those who can read it.
How is it possible to look at the earliest moments of the universe? Physicists have their ways—and what they find out will tell us a lot about how the universe works today and how it will unfold in the future.