From DeepSkyVideos.

Dr Becky Smethurst discusses Messier 5.
More links and info in full description ↓↓↓

Becky Smethurst website, with links to her various activities: https://rebeccasmethurst.co.uk

The paper discussed: https://www.aanda.org/articles/aa/full_html/2013/10/aa22004-13/aa22004-13.html

More links and info in full description ↓↓↓

Messier Objects playlist: http://bit.ly/MessierObjects

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Video by Brady Haran