Obsavabul univas

Di obsavabul univas bi a ball-shaped rijion of di univas komprising all mata wen we fit obsav from Earth or it space-bazed teleskops and exploratory probes at di present time; di elektromagnetik radiashion from dis objects has had time to reach di Sola System and Earth since di beginning of di cosmological expansion. Inishially, it dé estimated say there it fit bi 2 trillion galaxies de di obsavabul univas. Di nomba reduce for 2021 to only several hundred billion bazed on data from Niu Horizons. Assuming di univas dé isotropik, Di distans to di edj of di obsavabul univas rofly dé the same in evri dairekshion. Dat is, di obsavabul univas bi a sferikal rijion centad on di obsava. Evri lokashion for di univas get it own obsavabul univas, wen fit or no fit ovalap with di one wen Earth bi di centa.

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Di word obsavabul for dis sense no dé refer to di kapability of modern teknoloji to detet laight or other informatlshion from any objekt, or whether anything to bi deteted dé. It refer to di fysikal limitwen speed of light itself kreate. No signal fit travel faster than light. Hence a maximum distans, wen we been dé kol di partikul horizon, beyond which nothing fit dé deteted, as di signals no fit reach us yet. Sometimes astrofysicists distinguish between di obsavabul univas and di visibul univas. Di former inklude signals since di end of di inflationary epoch, while di latter inkludes only signals emitted since recombination.This is when hydrojen atoms were formed from protons and elektrons and di univas bekom transparent to elektromagnetik radiashion.

Akording to kalkulashions, Di kurrent komuvin distans to partikuls from which the kosmic mikrowave background radiashion (KMBR) was emitted, which represents di radius of di visibul univas, be about 14.0 billion parsecs (about 45.7 billion laight-years). Di komuvin distans to the edj of the observabul univas bi about 14.3 billion parsecs (about 46.6 billion laight-years), about 2% larjer. Di radius of di obsavabul univas is therefore estimated to be about 46.5 billion laight-years. Using the critical density and di diameta of di obsavabul univas, di total mass of ordinary mata in di univas can bi calculated to bi abaut .See the "Mass of ordinary matter" for dis sekshion in this article. In November 2018, astronomers reported that extragalactic background light (EBL) amounted to  photons.

As di univas expansion dd accelerate.

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