answersLogoWhite

0

By analysing the oldest stars found.

The older the star, the older the Galaxy.

User Avatar

Wiki User

15y ago

What else can I help you with?

Continue Learning about Astronomy

How did Harlow Shapley determine where the center of the galaxy lies?

Harlow Shapley determined the center of the galaxy by studying the distribution and motion of globular clusters. By observing the positions and velocities of these clusters, he discovered that they were not evenly distributed in the sky but rather congregated towards a point in the constellation Sagittarius, indicating the center of the galaxy.


Is 42 the real meaning of the universe and everything in it?

It is an answer created by Douglas Adams in the Hitchhiker's Guide to the Galaxy. It was supposedly the answer to 'Life, the Universe and Everything.' How accurate it is remains to be determined.


What does the size of a galaxy mean?

The size of a galaxy refers to its physical dimensions, typically measured in terms of its diameter or radius. Larger galaxies can contain billions to trillions of stars, while smaller galaxies may have fewer stars. Galaxy size can also provide clues about its age, structure, and evolutionary history.


How big is the Andromeda Galaxy?

The Andromeda Galaxy or M31 has been estimated to be 220,000 light years across. Our Galaxy, The Milky Way, is about 100,000 light years across.See link for more information.The latest estimates for the diameter is about 43,000 ly across.This is based on a 3.18 degree angle in the sky and a distance of 2.54 Mly.A big caveat here that this is only the visible part of the galaxy. Since a galaxy must be made up of a substantial amount of dark matter the true size of the galaxy cant be determined at the moment.


What determines the look back time of an object?

The look back time of an object is determined by how long it takes the light from that object, usually a star or galaxy, to reach an observer here on earth.