The Early Universe
After more than six years of grinding and polishing, the first-ever dual-surface mirror for a major telescope is complete.
Cosmic inflation refers to a period of rapid, accelerated expansion that scientists think took place about 14 billion years ago.
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.