  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.
