That ‘patch’ of light is M13, the Great Globular Cluster – COSMIC TRIBUNE
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IT’S NOT JUST IN YOUR MIND!

That ‘patch’ of light is M13, the Great Globular Cluster

In 1716, English astronomer Edmond Halley noted, “This is but a little Patch, but it shews itself to the naked Eye, when the Sky is serene and the Moon absent.”

M13, the star cluster visible to the naked eye, is 25,000 light years away. The nearest galaxy, Andromeda, is 2.6 million light years distant.

Of course, M13 is now modestly recognized as the Great Globular Cluster in Hercules, one of the brightest globular star clusters in the northern sky. Telescopic views reveal the spectacular cluster’s hundreds of thousands of stars.

At a distance of 25,000 light-years, the cluster stars crowd into a region 150 light-years in diameter, but approaching the cluster core upwards of 100 stars could be contained in a cube just 3 light-years on a side. For comparison, the closest star to the Sun is over 4 light-years away.

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