Definition of protogalaxy in English:


Line breaks: proto|gal¦axy
Pronunciation: /ˈprəʊtəʊˌgaləksi

noun (plural protogalaxies)

  • A vast mass of gas from which a galaxy is thought to develop.
    More example sentences
    • According to current models, that's not enough time to allow for the formation of either the quasars that illuminate the atomic gas or the protogalaxies that harbor the first stars.
    • The protogalaxy probably has since coalesced into a giant elliptical galaxy, he says.
    • Those that are still around us bear the imprint of the chemical composition of the protogalaxy in their atmospheres, like living fossils of a bygone era in the history of the Earth.



More example sentences
  • Eventually, these protogalactic fragments merged and galaxies and quasars formed.

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Word of the day astrogation
Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
(in science fiction) navigation in outer space