For decades, scientists have known that ordinary matter — everything made of atoms — accounts for just 15% of the universe’s matter. The rest is mysterious dark matter. But even that modest slice didn ...

Astronomers tallying up all the normal matter—stars, galaxies and gas—in the universe today have come up embarrassingly short ...

Experts have unveiled the most detailed images yet of the universe’s infancy, capturing light that traveled for more than 13 ...

The spins of some early galaxies could be a clue that the entire observable universe exists within a black hole—except, that ...

This has given scientists their best look yet at the Cosmic Microwave Background (CMB) - the leftover radiation from the Big Bang which fills the entire observable universe. What looks like clouds ...

A trip back in cosmic time This cosmic trip back in time revealed that the observable universe extends for almost 50 billion light-years in all directions around us. The universe's mass was ...

“We’ve measured more precisely that the observable universe extends almost 50 billion light-years in all directions from us and contains as much mass as 1,900 ‘zetta-suns,’ or almost 2 trillion ...

"We've measured more precisely that the observable universe extends almost 50 billion light years in all directions from us, and contains as much mass as 1,900 'zetta-suns," or almost 2 trillion ...

Equivalent to almost two trillion trillion suns, that’s the amount of mass (or its counterpart as energy) that these images show to exist in the entire observable universe, which extends almost ...

The supposed size limit — 381 kilometers per side — originates from technical constraints within Adobe’s Acrobat reader.