forces Archives

July 19, 2021July 19, 2021 by Paul M. Sutter

Where can we find a fifth force of nature?

Hubble image of Messier 54, a globular cluster located in the Sagittarius Dwarf Galaxy. Credit: ESA/Hubble & NASA

We know of four fundamental forces of nature, with no signs of a fifth. But dark matter and dark energy make up over 90% of all the contents of the universe. So the question remains: could there be a fifth force hiding in the “dark sector” of our universe?

November 10, 2015December 28, 2015 by Fraser Cain

Astronomy Cast Ep. 392: The Standard Model – Intro

Humans, cars and planets are made of molecules. And molecules are made of atoms. Atoms are made of protons, neutrons and electrons. What are they made of? This is the standard model of particle physics, which explains how everything is put together and the forces that mediate all those particles.
Continue reading “Astronomy Cast Ep. 392: The Standard Model – Intro”