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electron degeneracy pressure
An effect of quantum physics that provides the support against gravity in a white dwarf star.
A galaxy that appears as an elliptical distribution of stars (typically old stars).
A spectral line produced when atoms of a particular type emit photons with a specific energy.
The boundary around a black hole within which the escape velocity exceeds that of light. Note that this does not consist of a solid, physical surface.
A planet orbiting a star other than the Sun. Shortened version of extrasolar planet.
The power to which a number or quantity is raised. For example, 103 is read as 'ten to the power 3' and means 10 x 10 x 10, where the exponent (or index) is '3'.
Of or pertaining to the Universe outside our own galaxy.
A planet orbiting a star other than the Sun. Also abbreviated to exoplanet.
A highly energetic form of solar activity, typically lasting a few hours, caused by the sudden release of magnetic energy in the corona.