Understanding the ‘dark’ universe and primordial galaxy formation
Visible matter constitutes only 16% of the universe’s total mass. Little is known about the nature of the rest of that mass, which referred to as dark matter. Even more surprising is the fact that the universe’s total mass accounts for only 30% of its energy. The rest is dark energy, which is totally unknown but is responsible for the universe’s accelerated expansion.
phys.org
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2020-11-20
