Volume 22: Pages 344-347, 2009
The age of the Universe is twice the standard estimate
Allen D. Allen 1
1CytoDyn, Inc., Santa Fe, New Mexico 87505, USA
The standard calculation for the age of the flat, radiation-dominated lambda-cold-dark-matter Universe is t=1/H 13.7 Gyr, where H 71 km s−1 Mpc−1 is Hubble’s constant. By definition, v=sH, where v are the radial velocities of the receding galaxies and s are their distances. By direct substitution from the first into the last, we obtain v=s/t or, equivalently, s=vt. Since this is unlikely in a Universe of gravitating galaxies and dark energy, it is worth recognizing that there exist no observational data to confirm that the expansion of the Universe ever slowed due to gravity. Indeed, it is ironic that the surprising and unexpected discovery of accelerating expansion came from observations that were intended to confirm the slowing of expansion due to gravity. Taking this into account, and assuming a uniform rate a of acceleration for simplicity, the age of the Universe becomes t=2/H 27.4 Gyr since s=f(t) become s=1/2 at2 instead of s=vt or, equivalently, s=∫v=∫at, where the indefinite integral “∫” denotes the antiderivative. This admits to a treatment of several conceptual problems discussed by others.
Keywords: Cosmos, Universe, Big Bang, Lambda-Cold Dark Matter (λCDM), Hubble’s Constant, Age of the Universe, Expansion, Dark Energy, Cosmic Time, Review
Received: November 3, 2007; Accepted: June 9, 2009; Published Online: August 27, 2009