Lemaitres Limit
  Georges Lemaitre gave a theoretical proof for his 1927 doctoral thesis in astronomy that the maximum spherical radius of our Universe can be computed from first principles to be 14.2 billion light-years (Lemaitre 1927a). That estimate, which is known as Lemaitres limit, is surprisingly close to current estimates of the Universes age. Such coincidence, to within 3%, between the predicted size and observed age of the Universe is more significant today because of the resurrection in the late 1990s of the cosmological constant (also known as vacuum or dark energy). The most precise Hubble constant to date, H = 69.32 km/s/Mpc based on the full nine-years of Wilkinson Microwave Anisotropy Probe measurements, is within 1% of the value predicted based on Lemaitres Limit, H = 68.7 km/s/Mpc. If Lemaitres Limit is resurrected, it will revolutionize cosmology. 
Ian Steer
physics.hist-ph