Saturday

Callisto transits Jupiter from 22:55 BST (21:55 UT), appearing centrally on Jupiter’s disc at 00:45 BST on 26 July, (23:45 UT, 25 July), and finishing at 03:00 BST (02:00 UT) on the 26th. Callisto’s shadow chases the Moon from 01:40 BST (00:40 UT) on 26 July.

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