Cosmos:elementary | How do star clusters become spherical, how they form and live over billions of years? @Cosmos_elementary | Uploaded February 2020 | Updated October 2024, 29 minutes ago.
Why do stars of globular clusters form almost a perfect sphere? Why are they so stable? Also we are going to talk about shapes of objects and systems in the Universe.

My video on Blue straggles:
youtube.com/watch?v=e9oV9dMQaRk

Sources:
Globular cluster database
messier.seds.org/xtra/supp/mw_gc.html
Clusters in M87
nasa.gov/feature/goddard/2017/messier-87
Globular clusters in the bulge
earthsky.org/space/globular-clusters-milky-way-heart-bulge-camargo
Orbits of clusters
https://sci.esa.int/web/gaia/-/60227-globular-clusters-and-dwarf-galaxies-orbiting-the-milky-way
Palomar 12
spacetelescope.org/images/potw1507a
arxiv.org/pdf/astro-ph/0006314.pdf
Antennae galaxies
spacetelescope.org/images/heic0615a
Formation of the Solar System,
http://spiff.rit.edu/classes/phys106/lectures/ss_form/ss_form.html
Globular clusters
https://ned.ipac.caltech.edu/level5/Ashman/Ashman1.html
space.com/29717-globular-clusters.html
Formation of Globular clusters
arxiv.org/pdf/1801.05818.pdf
arxiv.org/pdf/astro-ph/0305199.pdf
Open clusters lifespan
uni-heidelberg.de/presse/meldungen/2019/m20190114_open-star-clusters-live-longer-than-previously-assumed.html
What holds clusters together
astro.keele.ac.uk/workx/globulars/globulars.html
medium.com/starts-with-a-bang/astroquizzical-why-doesn-t-a-globular-cluster-collapse-422c4b985ec2
Shapes of clusters
iopscience.iop.org/article/10.3847/1538-3881/153/2/57
Formation of elliptical galaxies
https://www2.ifa.hawaii.edu/newsletters/article.cfm?a=187&n=18
http://www.astro.osu.edu/~ryden/ast162_8/notes35.html
Stellar dynamics in clusters
http://www.astro.caltech.edu/~george/ay20/globcl-sgd-st.pdf
https://cds.cern.ch/record/312581/files/9610076.pdf