Date: October 7th, 2021

Exposure: 11 x 60 seconds (0h 16min)

About This Image


Telescope: Sky-Watcher Equinox 120ED
Mount: Software Bisque Paramount MX
Camera: ZWO ASI2600MC-Pro
Filter: IDAS LPS-D3 2"
Accessories: ESATTO 2" Focuser • Sky-Watcher 0.85 Reducer
Guiding: SBIG ST-i Guide Kit
Software: Photoshop • PixInsight • TheSkyX


Deep within the constellation Hercules, the M13 globular cluster beckons with its captivating allure. Located approximately 25,000 light-years away from Earth, it spans an impressive diameter of about 145 light-years. Within this stellar metropolis, hundreds of thousands of tightly packed stars create a breathtaking display that defies the vastness of space. M13 is one of the brightest and most remarkable globular clusters visible from the Northern Hemisphere, often referred to as the Great Hercules Cluster. It boasts a dazzling concentration of stars, with estimates suggesting a stellar population of over 300,000.

The stars in M13 vary in age, with the cluster containing a mix of ancient and relatively younger stars. The ancient stars, formed over 12 billion years ago, are among the oldest known objects in our galaxy. This rich stellar tapestry provides a glimpse into the early stages of the universe, allowing astronomers to study the processes of stellar evolution and the dynamics of densely packed stellar systems. The M13 globular cluster stands as a testament to the immensity and beauty of the cosmos, inviting us to contemplate the wonders of the universe and the countless stories that reside within its celestial tapestry. Its brilliance serves as a beacon, captivating our imagination and fueling our desire to explore the depths of the cosmic ocean that stretches far beyond our reach.

Distance: 25,0000 light-years
Size: 145 light-years


All Images    Craig Sherris