I would go with "globular clusters" This is a spherical group of about
a 100 million stars. One of its great features for intelligent
life to have plenty of time to evolve comes from this fact. The stars
these clusters contain are what our sun's age would be if we added 3
billion years. These stars were created at a time when hydrogen,helium
nebular(clouds) were very dense,but these clouds had no dust to help
gravity and electro-magnetizium to create fusion. They took lots of time
to become stars. This is the reason these stars last so long,they
have 100 of times less iron than the sun I read these stars do a lot of
traveling,and this means to me they could have picked up rock planets
going through space. Bert