PRIDE CHEKERAcosmological constant, represented by a Greek letter lamda, Λ.
This component is a representative of that antigravity force
which tend to pull things apart as gravity tend to pull things
together.
Thus at that moment, Einstein's universe was stationary, not
dynamical, looking the same in every direction and with a
uniform density distribution in all direction, relative to Earth,
(Note: there is no direction in space). This was fully accepted at
the moment, and was a betterment of the Steady State Theory,
stationary and eternal universe. At that moment, no one knows
what was that antigravity force, what was its origins and
mediators. It was just a mystery.
Hubble and an expanding universe
In 1924, American astronomer Edwin Hubble working at Mount
Wilson Institute peered into the cosmos through a large
telescope. He discovered an Andromeda nebulae and many
others thousands of light years away from us.
In 1929, he discovered that those nebulae were, in fact, other
galaxies like our Milky Way, and through use of Doppler
spectroscopy he discovered that all these galaxies were moving
away from the Milky Way galaxy (note: except Andromeda, it is
approaching Milky Way galaxy from a distance of about 2.3