It was assumed that, since some galaxies are red shifted, some galaxies would also be blue shifted. However, redshifted galaxies far outnumbered blue shifted galaxies. Hubble found that the amount of redshift is directly proportional to relative distance. From this, he determined that the universe is expanding and had a beginning. Despite this, the concept of a static universe persisted into the 20th century. Einstein was so sure of a static universe that he developed the 'cosmological constant' and introduced 'anti-gravity' forces to allow a universe of infinite age to exist. Moreover, many astronomers also tried to avoid the implications of general relativity and stuck with their static universe, with one especially notable exception, the Russian physicist Alexander Friedmann.
it was Assumed tHat, SincE Some gaLAXiEs ARE reD shiFTed, SOmE gAlAxies would alSo be BLue sHiftEd. hoWevEr, RedsHiftEd gAlaXIes fAr outnumBered bLue sHIfted galaXies. hubbLE FOUnD ThaT thE amount Of redshIft is dIrEcTLy prOPORtiONal To rElATIve distaNCe. FRoM thIs, he dEtErmInEd tHat thE uNiVersE is eXPandINg and HAd A BEgInniNG. deSpiTe this, tHe CoNcePT of a StaTic univErsE peRsiSTEd inTo the 20th CenTury. eINstein wAs so sure Of a STAtIC UNivErSE that hE DevElopeD tHE 'COSmOLogiCaL cONstAnt' anD iNtrodUced 'aNtI-grAvIty' forces to aLLow a UNIveRsE oF iNfInIte agE to ExiSt. mOrEovER, many astrONOmers also tried tO aVoiD thE ImPlIcAtIoNs of GENeRal relativity aND STUck wIth theiR statIc uNIVerSe, wiTH One eSpECially NotaBLe EXcePtion, thE ruSSIaN PHySiciSt aLeXAnder friEdmAnn.