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| | Messier Object 67 |
 | | Open Cluster M67 (NGC 2682), type 'f', in Cancer |
 | | M67 is one of the oldest known open clusters, and by far the oldest of Messier's open clusters, being aged at 3.2 billion years in the Star Catalog 2000; Mallas/Kreimer quote an even higher, but probably outdated value of 10 billion years. |
 | | Only few known open clusters were found to be older, among them probably NGC 188 at about 5 billion years, longly quoted as the oldest known cluster, and NGC 6791, which is about 7 billion years old (according to Götz), and is currently the oldest known open cluster in our Milky Way galaxy. |
| www.seds.org /messier/m/m067.html (289 words) |
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