I have a serious question which has been on my mind for awhile. I was thinking about the problem three months ago, and then forgot about it. My question is this, suppose that the theory of relativity is totally wrong ok? And so now I want to try to figure out how old the universe is, lets say in years.(adsbygoogle = window.adsbygoogle || []).push({});

Ok so, start off at the first moment in time. Lets suppose all the matter in the universe was very close to the center of mass of the universe (CMU). Ok so, there is a huge outwards motion of particles as we move towards now. Now during that expansion, gravity worked to slow it down. But of course, as matter moves further and further away from the CMU (in a roughly symmetric way) that force is approaching zero. Lets say after a few million years, its zero. So after a few million years ago, the center of mass of our solar system was moving outwards from the CMU at a constant speed, lets call it V.

V = distance/time

So now, if we know this speed, and we know the distance the center of mass of our solar system is away from the center of mass of the universe, then we can compute the age of the universe.

So thats how I want to do it.

So let T denote the age of the universe. Solving for T we have:

T = age of the universe = D/V

Where D is the distance the center of mass of our solar system is away from the center of mass of the universe, and V is the roughly constant speed at which the center of mass of our solar system is moving away from the CMU.

So here comes the question, how can we figure out in what direction we have to look, to be looking towards the center of mass of the universe.

I am sort of wondering if we could triangulate it, or already have done so.

From where we are, I am thinking there is a plane through which all our planets orbit. I know some planets are not in the plane, but I think most sort of travel in a common plane. So now, is it the case that the center of mass of the universe lies in this plane? That would at least narrow it down a bit. Then perhaps if we looked at some tilted galaxies we could triangulate. Then if we can figure out how far they are away from us, we would know our distance from the CMU. After that, it is only a means of measuring our speed away from that point, computing it in some fashion or other.

Before everyone criticizes this post, I would just like to say one thing:

I think 14 billion years is way way way not enough time for the universe to be as it is. Stars had to form, then explode, then reform. Everything had to travel really far to get where it is. Oceans had to form, rain rain, evolution, life, etc. I mean, saying that the age of the universe is of the same order of magnitude as the age of the earth, is totally unintuitive. I am thinking that the universe is over 100 billion years old, and I wouldnt even be surprised if it was a trillion years old. Beyond that I think is pushing it. I have an intuitive understanding of how long a year is, and I am just saying, 14 billion years is too young. So anyways, does anyone know what direction to look to find the CMU?

**Physics Forums - The Fusion of Science and Community**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Calculating The Age Of The Universe

Loading...

Similar Threads for Calculating Universe | Date |
---|---|

B B Calculating the age of the universe with the Hubble constant | Jan 6, 2017 |

I Calculating average density of the Universe | Apr 21, 2016 |

Calculating the Age of Planets without Radioactive Dating | Mar 7, 2015 |

Calculating the luminosity density of the universe | Mar 12, 2009 |

Calculating the age of the universe | Jun 14, 2005 |

**Physics Forums - The Fusion of Science and Community**