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David

Darling

radiant

Leonids meteor storm in 1999

Leonids meteor storm in 1999. © Juan Carlos Castada.


The radiant is the point where the backward projection of a meteor trajectory intersects the celestial sphere. More generally, the point in the sky from which meteors of a specific shower seem to come. This point moves against the background of the stars as Earth passes through the meteor stream, a movement known as radiant drift.