Measuring 93 billion light-years in diameter, the universe is so big that it can be overwhelming to envisage. Despite its ...

New research by the Atacama Cosmology Telescope (ACT) collaboration has produced the clearest images yet of the universe’s infancy — the earliest cosmic time yet accessible to humans. The researchers ...

"I had to take a deep breath when I saw the images because of their beauty and because of their high resolution." When you purchase through links on our site, we may earn an affiliate commission. Here ...

Now let's lift up from Earth for a big-picture look at the changing universe. Astronomers know that the universe is expanding and picking up speed as it does so. But what is this cosmic acceleration?