What’s now been discovered is a cosmic background—a web—of long-wavelength gravitational waves. They’re thought to come from supermassive black hole binaries—two supermassive black holes ...

Two recent studies by Professor Stefano Profumo at the University of California, Santa Cruz, propose theories that attempt to ...

The cosmic microwave background — the leftover light from when the universe was only 380,000 years old — soaks the entire cosmos, filling every cubic centimeter.

This is the Cosmic Microwave Background, electromagnetic radiation from almost 13.8 billion years ago, immediately after the Big Bang. It’s the border of the known universe.

The cosmic microwave background – the afterglow of the Big Bang – contains clues about the nature of dark energy. Credit: WMAP / Wikimedia, CC BY-SA ...

Here’s how it works. An artist's impression of the cosmic web. It looks like a vast cobweb-like structure or mostly purple and some orange filaments on a black background.