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500,000 Suns | by pablo_blake
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500,000 Suns

M3

 

Clusters of stars come in two flavors. Open clusters, where the stars eventually drift apart; and globular clusters, where the stars are gravitationally bound. Our galaxy has about 150 globular clusters orbiting in its halo. At an age of 8 billion years, Messier 3 is a youngster as far as globular clusters go. At a distance of 33k light-years it's apparent diameter, 18 archmin, corresponds to a physical diameter of about 180 light-years.

M3 is an excellent target for relatively small telescopes, and can even be glimpsed by the unaided eye under darks skies. With a telescope of at least 8" in diameter, the stars become well resolved.

 

Nikon D5500

Nikon 300mm MF ED f/4.5, @ f/5.6

55x30s, 1600iso

SkyGuiderPro

Regim - Sig18

Affinity Photo

 

cropped - 50% reduced

 

RG_M3_Sig18_APap_c50r90q

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Taken on June 5, 2018