gravity pulls on it, and then it reaches an acetote and levels out. It still wants to expand and gravity makes it want to contract. This makes space infinite and flat. We look at how fast galaxies move away fro each other, because Hubble's law is based on the brightness of distant stars. From the knowledge that we have and through measurements of matter, model two would be the most precise one.90% of all matter in the universe is dark matter that we can not detect. If this theory is true, everything we know of is compressed down to a point and then expands rapidly in all directions. The Big Bang theory, which is the sudden appearance and expansion of the universe from nothingness, is a singularity that some people believe. The distance to neighboring galaxies is zero at the Big Bang. This was conceived in the mid 1930's to agree with Friedmann's models, and gained acceptance in the 1960's. The theory of Relativity fails to explain this, and all theories for that matter break down at a singularity. Whatever happened before the Big Bang have no consequence to the aftermath. Our concept of time starts from the Big Bang. The Catholic church liked this concept in that it leaves room for somethin to start it, which coincides with creation. Stephen Hawkin and Roger Penrose confirmed the Big Bang mathemathically that the begining of the universe began with singularity. physics break down with a singularity and therefore science loses its predictability.Because of the expansion of the universe we may have five forces, but we only know of four. If the rate of expansion is increasing, Hubble's constant might not be constant. We can find the rate of expansion when we calculate the age of the universe by shrinking the distance of the galaxies back to zero. Through velocity and distance we can calculate time. We think the universe is 13 or 14 billion years old. An alternate to the Big Bang was proposed in 1948 by Hermand Bondi, Tho...
