Epo: Accessing holographic database…
Alkina: Hello Dr. Hubble, …have we met?
Hubble Projection: Hello Alkina!
Hubble Projection: Well, I am just a projection of the original Edwin Hubble, but yes, you have interfaced with my program before.
Alkina: Really? Can you tell me anything about how we got here?
Epo: Sorry Alkina, but this part of the database is corrupted…
Hubble Projection: I can answer any basic cosmology questions if you’d like.
Alkina: Very well Dr. Hubble, tell me all about the expanding universe!
In human speak please!
During the 1920’s a very important discovery was made in astronomy. The universe, long thought to have existed in the same size and shape forever, was actually expanding! Moreover, measurements of the red shifts of galaxies showed that the farther galaxies were from us, the faster they were moving away from us.
This relationship, known as Hubble’s Law, provides important observational evidence for the Big Bang origin of the universe. In this theory, the universe was created from the rapid expansion of a hot, infinitely dense mass about 13.7 billion years ago.
It should be noted that it is the space between the galaxies that is expanding and not the galaxies themselves.