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Hubble Captures Cluster of Aging Stars

Dragon
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Post by Dragon Fri Jun 29, 2018 8:42 pm

This rich and dense smattering of stars is a massive globular cluster, a gravitationally bound collection of stars that orbits the Milky Way. Globular clusters are denser and more spherical than open star clusters like the famous Pleiades. They typically contain hundreds of thousands of stars that are thought to have formed at roughly the same time.

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Dragon
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Post by Dragon Fri Jun 29, 2018 8:45 pm

Hubble Captures Cluster of Aging Stars Potw1826a
Image Credit: ESA (European Space Agency)/Hubble & NASA

Studies have shown that this globular cluster, named NGC 6139, is home to an aging population of stars. Most globular clusters orbiting the Milky Way are estimated to be over 10 billion years old; as a result, they contain some of the oldest stars in our galaxy, formed very early in the galaxy’s history. However, their role in galactic evolution is still a matter of study.

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Hubble Captures Cluster of Aging Stars 334pu7m
Dragon
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Post by Dragon Fri Jun 29, 2018 8:46 pm



A Pan Across the Butterfly Nebula.


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Hubble Captures Cluster of Aging Stars 334pu7m
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Post by Dragon Fri Jun 29, 2018 8:47 pm



Planetary nebula M2-9 is known as Wings of a Butterfly Nebula, Butterfly Nebula or Twin Jet Nebula and is located some 2100 light-years away from Earth.


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Hubble Captures Cluster of Aging Stars 334pu7m
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Post by Dragon Fri Jun 29, 2018 8:49 pm



Time lapse imagery of the Butterfly Nebula (M 2-9) taken between 1997 and 2010 with the Nordic Optical Telescope located in the Canary Islands.

Green represents emissions of Oxygen III, and red represents emissions of Nitrogen II.


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