Universal Thunderdome: Two Early Galaxies Enter, One Early Galaxy Leaves

Why were there old, enormously massive galaxies no longer forming new stars in the very early universe? The first stars already emerged in the very early universe about 200 million years after the Big Bang. Gas is the raw material used to form stars and giant clouds of hydrogen and helium and dust (and whatever "dark matter" will eventually be) contracted and eventually the gas became so compact that the pressure heated the matter so that glowing gas balls were formed and new stars were born.  read more

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