Scientists say they’ve discover another galaxy 13 billion years old. You count the rings in a tree to determine its age. Human celebrate birthdays. You can tell by an animal teeth how old it is. But how do you figure out the age of a GALAXY?
Scientists say they’ve discover another galaxy 13 billion years old. You count the rings in a tree to determine its age. Human celebrate birthdays. You can tell by an animal teeth how old it is. But how do you figure out the age of a GALAXY?