Originally Posted by snowflakeuniverse

Age of Oldest Globular clusters --(From post number 21)
The following list includes the oldest ages of low metal Globular Clusters. The ages are organized chronologically by date of publication....
number less than or equal to 13 = 27
number greater than or equal to 14= 35
number greater than or equal to 15= 32
number greater than or equal to 16= =22

The data from Hipparcos reduced the age of Globular Clusters a bit after 1997. Modelers have adjusted the age up and down by considering other influences. Most changes were adopted in an effort to find a mechanism that reduce the age of Globular Clusters to avoid conflict with the age of the Universe.

After two days of reading only the abstracts, I tend to believe in the work of those advocating the oldest age of Globular Clusters to be in the 14 to 16 billion year old range. The reports tend to be more though and an understanding of the complexities involved seem to be more considered. This is probably in part due to the amount of criticism they know they will receive. My impression was that those who derived younger maximum ages tried to “force” the equations to reduce age. After a young age (less than 13), is published, there is another paper soon published using the same but generally more detailed considerations arguing for a much older age. The advocates who date GC to be 14 billion years old or older also tend to point out problems when such a young age is assumed. When these theoretical modelers meet there must be some clashes.

Note that even in 2003 there are still some advocating GC to be 15.9 to 16.3 billion years old. This is older than the popularly stated age of the universe.

Snowflake.