THE BIG PIC­TURE

Sky at Night Magazine - - THE SKY GUIDE -

AN­I­MA­TION RE­VEALS MORE

Jupiter is a won­der­ful planet to im­age but if you take too long when col­lect­ing your im­ages it’s easy to in­tro­duce mo­tion blur, tak­ing the edge off any fine de­tail. This is es­pe­cially true when at­tempt­ing to im­age special events such as tran­sits of the Galilean moons.

The prob­lem here is that you have two rapid mo­tions to deal with; the spin of the planet and the rel­a­tive mo­tion of the moons and their shad­ows. Short cap­tures are the key but can pro­duce noisy re­sults. A good com­pro­mise is to cre­ate an an­i­ma­tion. The move­ment you record can pro­duce a fas­ci­nat­ing re­sult that brings home how three-di­men­sional the Jo­vian sys­tem re­ally is.

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