An atom consists of a heavy center, called the nucleus, made of particles called protons and neutrons. An atom has lighter ...

Many heavy atoms form from a supernova explosion, the remnants of which are shown in this image. NASA/ESA/Hubble Heritage ...

Most of the universe’s hydrogen and helium atoms formed around 400,000 years after the Big Bang, which is the name for when scientists think the universe began, about 14 billion years ago.

Once they escape the Sun, they zoom through space at the speed of light, eventually reaching Earth and giving us that sweet, ...

This deep view of the Orion Constellation glows in reddish hues thanks to a filtered view of hydrogen alpha emission, a type ...

Antognini has experience in measuring muonic atoms. A few years ago, he carried out the same experiment with muonic hydrogen, which contains only one proton in the nucleus and whose one electron ...

Most of the universe's hydrogen and helium atoms formed around 400,000 years after the Big Bang, which is the name for when scientists think the universe began, about 14 billion years ago.

Most of the universe’s hydrogen and helium atoms formed around 400,000 years after the Big Bang, which is the name for when scientists think the universe began, about 14 billion years ago.

The researchers had previously measured muonic helium-4 and, a few years ago, the atomic nucleus of muonic hydrogen and deuterium. Muonic helium-3: Twice as slimmed-down Helium-3 is the lighter ...

Most of the universe's hydrogen and helium atoms formed around 400,000 years after the Big Bang, which is the name for when scientists think the universe began, about 14 billion years ago.