But the background visible light — dubbed the cosmic optical background, or COB — is challenging to measure from the inner solar system. Here, lots of interplanetary dust scatters sunlight, ...

Did light shine in the universe’s earliest moments, or was it hidden from view? While this question may seem simple at first, ...

The earliest light in the universe has been traveling across space since just after the Big Bang. Known as the cosmic ...

A ground telescope in Chile detected cosmic polarization signals, confirming the universe’s first stars' timeline.

The Cosmic Microwave Background carries with it a record of events throughout the 13.8-billion-year history of the universe. Just as Charles Darwin once used the fossil record to tell the story of ...

This afterglow, called Cosmic Microwave Background, or CMB, was created out of hot ionized plasma some 13.7 billion years ago, when the universe was just 380,000 years old.A small fraction of this ...