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Praznina (astronomija)

Svemir s Zemljom u centru, rasprostranjenost praznina i superpraznina na oko milijardu sg (307 MPc)
Praznine u blizini Mliječnog puta na oko 500 miliona sg. Superskup Virgo sadrži mnogo praznina

Praznina (en.Void) je struktura u Svemiru koju odlikuje potpuna odsutnost galaksija. Ima sferičan oblik, proteže se trodimenzionalno. Galaksije koje se nalaze u njihovoj blizini okružuju ih u obliku mjehurića. Ako se neka praznina presiječe vidljive su strukture rasporeda galaksija. Galaksije nisu ravnomjerno raspoređenje u Svemiru te sa prazninama oblikuju filamente. Vidljivi su čvorovi, koji sadrže velike galaksije. Savremena mjerenja (2006) pokazuju da praznine nisu veće od 100 MPc.[1]

Također pogledajte

[uredi | uredi izvor]

Reference

[uredi | uredi izvor]
  1. ^ Der Brockhaus ASTRONOMIE, 2006 Brockhaus GmbH LEipzig, Mannheim ISBN 3-7653-1231-2 (de)

Vanjski linkovi

[uredi | uredi izvor]
Morfologija
Struktura
  • Bar
  • Ispupčenje
  • Oreol tamne materije
  • Disk
  • Galaktički oreol
    • korona
  • Galaktička ravnica
  • Međuzvjezdana okolina
  • Protogalaksija
  • Spiralna ruka
  • Supermasivne crne rupe
Aktivno jezgro
Energetske galaksije
  • LAE
  • LIRG
  • Starburst galaksija
Interakcija
  • Samostojna galaksija
  • Galaktička plima
  • Grupa galaksija i jata
    • Blještavi grozd galaksija
    • Fosilna grupa
  • Interaktivna galaksija
    • pripajanje
  • Satelitska galaksija
  • Zvjezdani tok
  • Superklaster
  • Zidovi
  • Galaksije praznine
  • Praznine i superpraznine
podaci
  • grupe i klasteri
  • Velike kvazarske grupe
  • Najbliže galaksije
  • polarno-prstenaste galaksije
  • prstenaste galaksije
  • Kvazari
  • Spiralne galaksije
  • Superklasteri
  • Praznine
Također pogledajte
  • Tamna galaksija
  • Malaksala plava galaksija
  • Formiranje galaksija i evolucija
  • Intergalaktička prašina
  • Intergalaktičke zvijezde
  • Intergalaktičko putovanje
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Praznina (astronomija)
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