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A star of 15 solar masses exhausts its hydrogen in about one-thousandth the lifetime of our sun.
The fusion reactions of the CNO Cycle allows bigger stars to convert hydrogen to helium.
For stars of less than 4 solar masses, hydrogen burn-up at the center triggers expansion to the red giant phase.
Information regarding the movement of electrons between energy levels and the expected emission line spectrum.
From smaller than an atom to the size of the Universe in 41 steps. Pictures with descriptions at each level.
Ionization is the ejection of one or more electrons from an atom or molecule to produce a fragment with a net positive charge.
Device for detecting charged particles and other radiation by means of tracks of bubbles left in a chamber filled with liquid hydrogen or other liquefied gas.
An in-depth look at the physics behind trapping light in ultra cold atoms.
This site gives an overview of atomic and subatomic physics.
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