Astronomers are trying to listen to the universe's background hum — a cascade of gravitational waves believed to exist since the first rapid inflation of space following the Big Bang over 13.8 ...

The European Planck Space Observatory revealed the universe is older than thought: 13.82 billion years old. See the role of the Cosmic Microwave Background here.

What the "background noise of the universe" tells us about spacetime's origins August 6, 20243:00 AM ET By Regina G. Barber ...

For instance, accurately describing the cosmic microwave background has been vital for cosmology, but the universe was completely opaque to electromagnetic radiation for its first 379,000 years.

As the universe expanded, Sutter says, the plasma cooled and eventually — after 10,000 years, a mere fraction of our universe's history — atoms of hydrogen and helium formed.

Scientists may have identified the gravitational waves that make up some of the universe’s background, not just those coming from unusual events like black hole collisions. New Atlas reports ...

"Universe's ultraviolet background could provide clues about missing galaxies." ScienceDaily. ScienceDaily, 22 March 2017. <www.sciencedaily.com / releases / 2017 / 03 / 170322092411.htm>.