In 1934, Georges Lemaître used an unusual perfect-fluid equation of state to interpret the cosmological constant as due to vacuum energy.

The Kylchap was not the only advanced steam locomotive exhaust: another design, the Lemaître, had some success in France and England ; noted Argentinian engineer Livio Dante Porta designed several, the Kylpor, Lempor and Lemprex designs ; and several U. S. railroads including the Norfolk & Western used a concentric nozzle known as the waffle iron exhaust.

According to the Friedmann – Lemaître – Robertson – Walker metric which is used to model the expanding universe, if at the present time we receive light from a distant object with a redshift of z, then the scale factor at the time the object originally emitted that light is given by the equation.

The idea for making a movie based on these characters came from a chance meeting between Carné and Jean-Louis Barrault, in Nice, during which Barrault pitched the idea of making a movie based on Debureau and Lemaître.

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Lemaître.

The best-known exact solutions, and also those most interesting from a physics point of view, are the Schwarzschild solution, the Reissner – Nordström solution and the Kerr metric, each corresponding to a certain type of black hole in an otherwise empty universe, and the Friedmann – Lemaître – Robertson – Walker and de Sitter universes, each describing an expanding cosmos.

In 1927 Georges Lemaître showed that static solutions of the Einstein equations, which are possible in the presence of the cosmological constant, are unstable, and therefore the static universe envisioned by Einstein could not exist.

Alexander Friedman proposed a number of such solutions in 1922 as did Georges Lemaître in 1927 .< ref name = Lemaitre1927 >

Basing on Slipher's and Hubble's data, in 1927 Georges Lemaître realized that this correlation fit non-static solutions to the equations of Einstein's theory of gravity, the Friedmann – Lemaître solutions.

Still other solutions can describe a gravitational wave or, in the case of the Friedmann – Lemaître – Robertson – Walker solution, an expanding universe.

Georges Lemaître first proposed what would become the Big Bang theory in what he called his " hypothesis of the primeval atom.

This perception was enhanced by the fact that the originator of the Big Bang theory, Monsignor Georges Lemaître, was a Roman Catholic priest.

In 1927, the Belgian Roman Catholic priest Georges Lemaître independently derived the Friedmann-Lemaître-Robertson-Walker equations and proposed, on the basis of the recession of spiral nebulae, that the universe began with the " explosion " of a " primeval atom "— which was later called the Big Bang.

File: Lemaitre. jpg | Georges Lemaître ( 1894-1966 ): first person to propose the theory of the expansion of the Universe, first to derive what is now known as Hubble's law, made the first estimation of what is now called the Hubble constant which he published in 1927 ( two years before Hubble's article ), proposed the Big Bang theory of the origin of the Universe

* Georges Lemaître, originator of the " Big Bang " theory of the origin of the universe

The Big Bang itself had been proposed in 1931, long before this period, by Georges Lemaître, a Belgian physicist and Roman Catholic priest, who suggested that the evident expansion of the Universe in forward time required that the Universe contracted backwards in time, and would continue to do so until it could contract no further, bringing all the mass of the Universe into a single point, a " primeval atom ", at a point in time before which time and space did not exist.

This led the three to all start questioning the Big Bang theory originally proposed by Georges Lemaître in 1931 and later pioneered by George Gamow, which suggested that the universe expanded from an extremely dense and hot state and continues to expand today.

* Georges Lemaître ( 1894 – 1966 ), astronomer, priest and proposer of the Big Bang theory.

The Friedmann – Lemaître – Robertson – Walker metric that is necessary for the Big Bang and Steady State models emerged in the decade after the development of Einstein's general relativity and was accepted as a model for the universe after Edwin Hubble's discovery of his eponymous law.

Lemaître also proposed what became known as the Big Bang theory of the origin of the Universe, which he called his ' hypothesis of the primeval atom '.< ref >

where is the scale factor of the Friedmann – Lemaître – Robertson – Walker metric, and we have taken the Big Bang to be at.

* April-Abbé Georges Lemaître publishes in the Annales de la Société Scientifique de Bruxelles " Un Univers homogène de masse constante et de rayon croissant rendant compte de la vitesse radiale des nébuleuses extra-galactiques " proposing the theory of the expansion of the Universe, deriving what will become known as Hubble's law, making the first estimation of what will become called the Hubble constant, and proposing what becomes known as the Big Bang theory of the origin of the Universe, which he calls his ' hypothesis of the primeval atom '.

The cosmologist Georges Lemaître, the Big Bang theorist, was a former graduate student 1923-24 at the college, supervised by Sir Arthur Eddington.

* 1927 – Georges Lemaître: Theory of the Big Bang

A student of his, Georges Lemaître, was the first man to propose the Big Bang theory of the formation of the Universe.

Two years later, Georges Lemaître suggests that the expansion can be traced to an initial " Big Bang ".

As it happened, both Lemaître and Hoyle's models of nucleosynthesis would be needed to explain elemental abundances in the universe.

" Within the Friedmann – Lemaître – Robertson – Walker ( FLRW ) model, the presently most popular shape of the Universe found to fit observational data according to cosmologists is the infinite flat model, while other FLRW models that fit the data include the Poincaré dodecahedral space and the Picard horn.

The cosmological principle implies that the metric should be homogeneous and isotropic on large scales, which uniquely singles out the Friedmann – Lemaître – Robertson – Walker metric ( FLRW metric ).

Hubble is generally mistakenly known for Lemaître's law or " Hubble's law " which was discovered by Georges Lemaître.

In the Friedmann – Lemaître – Robertson – Walker ( FLRW ) model the universe is considered to be without boundaries, in which case " compact universe " could describe a universe that is a closed manifold.

So full of dramatic interest is the life of Edmund Kean that it formed the subject for the play " Kean " by Jean-Paul Sartre as well as a play by Alexandre Dumas, père, entitled Kean, ou Désordre et génie, in which the actor Frédérick Lemaître achieved one of his greatest triumphs.

Isou completes his first film, Traité de bave et d ’ éternité ( Treatise of Slime and Eternity ), which will soon be followed by Lemaître ’ s Le film est déjà commencé?

However due to the obscurity of the journals in which the papers of Lemaître and Synge were published their conclusions went unnoticed, with many of the major players in the field including Einstein believing that singularity at the Schwarzschild radius was physical.

In 1922, Alexander Friedmann found a solution in which the universe may expand or contract, and later Georges Lemaître derived a solution for an expanding universe.

He fitted larger diameter chimneys and Lemaître multiple jet blastpipes, which effectively transformed their performance.

Ducange wrote numerous plays and melodramas, among which the most successful were Marco Loricot, ou le petit Chouan de 1830 ( 1836 ), and Trente ans, ou la vie d ' un joueur ( 1827 ), in which Frédérick Lemaître found one of his best parts.

In 1931 Lemaître went further and suggested that the evident expansion of the universe, if projected back in time, meant that the further in the past the smaller the universe was, until at some finite time in the past all the mass of the Universe was concentrated into a single point, a " primeval atom " where and when the fabric of time and space came into existence.

* 1927 — Georges Lemaître discusses the creation event of an expanding universe governed by the Einstein field equations.

Independently, Georges Lemaître derived in 1927 the equations of an expanding universe from the General Relativity equations.

Indeed, Belgian priest Georges Lemaître, astronomer and physics professor at the Catholic University of Louvain, was the first to propose the theory of expansion of the universe, often incorrectly credited to Edwin Hubble.

The Friedmann – Lemaître – Robertson – Walker ( FLRW ) metric is an exact solution of Einstein's field equations of general relativity ; it describes a homogeneous, isotropic expanding or contracting universe that may be simply connected or multiply connected.

The classic solution of the Einstein field equations that describes a homogeneous and isotropic universe is called the Friedmann – Lemaître – Robertson – Walker metric, or FLRW, after Friedmann, and Howard Percy Robertson and Arthur Geoffrey Walker, and Georges Lemaître who worked on the problem in 1920's and 30's independently of Friedmann.