The Early Universe
Citizen scientists dive into particle physics and astrophysics research.
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.