https://researchportalplus.anu.edu.au/en/publications/the-spectroscopic-age-of-47-tucanae/fingerprints/?sortBy=alphabetically
The spectroscopic age of 47 Tucanae - Fingerprint - The Australian National University
age ofaustralian nationalspectroscopictucanaefingerprint
https://aspbooks.org/a/volumes/article_details/?paper_id=27121
Resolving the 47 Tucanae Distance Problem - aspbooks.org
resolvingtucanaedistanceproblem
https://astroanarchy.blogspot.com/2010/10/tucanae-47-globular-cluster-reprocessed.html
Astro Anarchy: Tucanae 47, a Globular cluster, reprocessed
This blog is all about astrophotography and it works mainly as an imaging diary. J-P Metsavainio is a Finnish astrophotographer,
globular clusterastroanarchytucanaereprocessed
https://apod.oa.uj.edu.pl/apod/ap970919.html
APOD: 19 września 1997 - Gromada kulista 47 Tucanae
Każdego dnia obraz lub zdjęcie powiązane z astronomią i kosmosem wraz z krótkim wyjaśnieniem
apodgromadatucanae