Carlton Pryor Quotes (3 Quotes)

All the stars in a cluster are the same distance away, so you can compare brightness without having to worry about whether a star that appears faint is actually very bright but just far away.

If you want to see how people grow, you can either watch a person for a lifetime or you can look at different populations of peoplefrom babies to old peopleand compare them.

Globular clusters are old and give us a limit on the age of the universe. The universe couldn't be younger than the oldest star cluster.