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Flashcards - Origins & Theories of the Universe

Flashcards - Origins & Theories of the Universe
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galaxy
A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter
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cosmological constant
In cosmology, the cosmological constant is the value of the energy density of the vacuum of space
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Dark Age
Dark Ages is a term of historical periodization traditionally meaning the Middle Ages
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Dark Age
Dark Ages is a term of historical periodization traditionally meaning the Middle Ages
cosmological constant
In cosmology, the cosmological constant is the value of the energy density of the vacuum of space
galaxy
A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter
solar system
The Solar System is the gravitationally bound system comprising the Sun and the objects that orbit it, either directly or indirectly
universe
The Universe is all of time and space and its contents
Big Bang
The Big Bang theory is the prevailing cosmological model for the universe from the earliest known periods through its subsequent large-scale evolution
recombination epoch
In cosmology, recombination refers to the epoch at which charged electrons and protons first became bound to form electrically neutral hydrogen atoms

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