Twin City Amateur Astronomers

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All Messier Objects
Messier 7
M7 - Ptolemy's Cluster
Constellation Scorpius Type Open Cluster Coordinates 17h 50m : -34° 48' Magnitude 4.09
M7 - Image credit: N.A.Sharp, REU program/NOAO/AURA/NSF

Hubble Space Telescope image: Galaxy NGC 2397 with an explosive secret
 
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