M3
Globular cluster M3 is one of the most beautiful globular clusters in the northern sky. Perhaps only M13, the Large Globular Cluster in Hercules, surpasses it in size and brightness. With extremely good visibility, it can be seen with the naked eye, which I have never been able to do. In a small telescope, it can be reliably found as a nebulous diffuse sphere. It is less than 33,900 light-years away and contains more than 500,000 stars. Because it is relatively young, it also contains a large number of variable stars. It was discovered by Charles Messier on May 3, 1764. The image also shows the small spiral galaxy NGC 5263 of 14th magnitude.
In May, the nights are already very short, so globular star clusters also come to the fore.
