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| Mizar |
a binary star in the constellation Ursa Major, having a magnitude of 2.2. |
| nova |
a star that suddenly becomes many times brighter and then gradually, in several weeks, months, or years, returns to its original magnitude. (Cf. supernova.) |
| order |
degree, as of size or magnitude. [1/17 definitions] |
| Polaris |
a variable binary star near the north celestial pole in the constellation Ursa Minor, having a magnitude of 2.1; North Star. |
| Pollux |
a yellow star in the constellation Gemini, having a magnitude of 1.1. |
| positron |
in physics, an elementary particle equal to an electron in mass, spin, and magnitude of charge, but whose charge is positive. |
| Procyon |
a yellowish white binary star in the constellation Canis Minor, having a combined magnitude of 0.4. |
| Regulus |
a blue-white binary star in the constellation Leo, having a combined magnitude of 1.3. |
| Richter scale |
a logarithmic scale from one to ten that is used to measure the intensity and magnitude of an earthquake. |
| Rigel |
a blue-white binary star in the constellation Orion, having a combined magnitude of 0.1. |
| scalar |
a quantity that has only magnitude and can be completely expressed on a scale. (Cf. vector.) [1/3 definitions] |
| seismicity |
a measure of the frequency, magnitude, and distribution of earthquakes in a given area. |
| Sirius |
a white binary star in the constellation Canis Major, the brightest star in the sky with a combined magnitude of -1.4; Dog Star. |
| spectrum |
an array of a physical system or phenomenon according to the magnitude of one of its properties such as mass or wavelength, esp. an array of light in the order of wavelengths that produces the rainbow. [1/2 definitions] |
| Spica |
a blue-white star in the constellation Virgo, having a magnitude of 1.0. |
| variable star |
a star that varies considerably in brightness and apparent magnitude because of internal pulsations, or because eclipsed by another star. |
| vector |
a mathematical expression of direction and magnitude, usually represented by an arrow pointing to the particular direction, with a length proportional to the magnitude. [1/3 definitions] |
| Vega |
a white star in the constellation Lyra, having a magnitude of 0.1. |
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