Portal:Astronomy/Picture/Week 31 2007

Add links
Source: Wikipedia, the free encyclopedia.

Globular cluster NGC 6397 is a "core collapsed" cluster that contains about 400,000 stars. Its age is estimated to be about 13.6 billion years, which was determined by using, for the first time, the beryllium content of two stars.

Retrieved from "https://en.wikipedia.org/w/index.php?title=Portal:Astronomy/Picture/Week_31_2007&oldid=148747105"