They know this because even though light moves pretty fast, the Universe is also extraordinarily huge, and when light from a distant star or galaxy has to travel vast distances, it can still take ...

Did you know some of the brightest sources of light in the sky come from the regions ... but satellites have spotted oodles of them across the universe. One of those satellites is NASA's Fermi ...

Just one light-year away from Earth is mind-boggling far away. CNN talked to science educator and engineer Bill Nye to attempt to understand the enormity of the universe and how we measure it.

Just as Charles Darwin once used the fossil record to tell the story of the evolution of life on Earth, astronomers are using the first light ever to shine through the universe to understand ...

Hot stars booted out of their galactic homes may be responsible for creating the conditions that led to today's universe In the beginning there was light—the brilliant light of the big bang ...

Seeing the universe just lighting up, even though it was only a faint signal, is even more important than the Big Bang because “we are made of star stuff and so we are glimpsing at our origin ...