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

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

Proton therapy is a type of external beam radiation therapy that delivers high dose radiation directly to cancer cells. Learn about its benefits and uses for breast cancer treatment.

The Large Hadron Collider (LHC) has begun its first-ever collisions of oxygen ions, in the latest attempt to understand the ...

If you add and subtract those fractions, you get the +1 charge of a proton. Valence quarks get lots of attention. But they’re about 1% of what’s inside a proton.

The world’s largest atom smasher has conducted its first-ever collisions between protons and oxygen ions, as part of an ...