This chart shows the internal view of the sky centered on the vernal equinox in a gnomonic projection between the declinations of 45° North and 45° South. Also depicted are the path of the comets C/1577 V1 (observed by Tycho Brahe), C/1585 T1 (Tycho Brahe), C/1590 E1 (Tycho Brahe), C/1664 W1 (Giovanni Domenico Cassini), C/1665 F1 (Johannes Hevelius), C/1672 E1 (Giovannia Domenico Cassini), C/1677 H1 (Johannes Hevelius), C/1680 V1 (John Flamsteed) and C/1683 O1 (Johannes Hevelius).
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