Cosmic microwave background is a sea of radiation that provides ... constant has since been revived to describe the mysterious dark energy that is currently speeding up the universe’s acceleration.

Measurements of the faint afterglow of the Big Bang (known as the cosmic microwave background) are also important. They do not directly measure dark energy or how it evolves, but they provide ...

In the past, such data dumps were largely the domain of the so-called "dark web," a sort of West West version of the internet that can only be accessed using special browsers and logins.