M13 is the biggest globular cluster visible to the northern hemisphere. Is it the remains of a galaxy that the milky way gobbled up?br/Imaging telescope / lensbr/ Celestron Cassegrain 203/2032 mm EdgeHD8br/ Imaging camerabr/ ZWO Optical ASI 1600 MM Pro (CMOS)br/ Mountbr/ Equatorial Losmandy GM811Gbr/ Guiding telescope / lensbr/ Celestron Cassegrain 203/2032 mm EdgeHD8br/ Guiding camerabr/ ZWO Optical ASI 178 MC (CMOS)br/ Accessoriesbr/ Focal reducer Celestron 0.7br/ Lights (filter Red)22 x 300 secbr/ Lights (filter Green)24 x 300 secbr/ Lights (filter Blue)22 x 300 secbr/ Total lights integration time5:40 hours