A surname from Swedish. / A lunar impact crater that is located on the far side of the Moon.

Ericameria obovata, a species of flowering shrub found in North America.

(physics, chemistry) Any atom which has a single valence electron in a shell well outside any other electrons in the aton; approximates the hydrogen atom.

(physics) A universal scaling factor for all spectroscopic transitions.

plural of Rydberg atom

(physics) A molecule, especially one consisting of two atoms of the same element, that has a permanent dipole because one of the atoms is in a very high excited state.

plural of Rydberg molecule

plural of Rydberg constant

A formula used in atomic physics to describe the wavelengths of spectral lines of many chemical elements.

plural of Rydberg state