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Physics & Astronomy Facts

Hot Gas Clouds
Dark Matter Mystery

While carefully measuring the speed of rotation of galaxies, astronomers stumbled upon a profound cosmic mystery. Determining the gravity of the galaxy. They could estimate what the rotation speed sho ...

The Equivalence Principle

Four hundred years ago--or so the story goes--Galileo Galilei started dropping things off the Leaning Tower of Pisa: Cannon balls, musket balls, gold, silver and wood. He might have expected the heavi ...

Nuclides & Isotopes

An atom that has an unbalanced ratio of neutrons to protons in the nucleus seeks to become more stable. The unbalanced or unstable atom tries to become more stable by changing the number of neutrons a ...

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