Which graph best shows the relationship of the size of the universe to the temperature indicated by the cosmic microwave background radiation?
Scientists infer that the universe began approximately
Which statement best describes galaxies?
According to this table, the average temperature of the universe since stage 3 has
What is the most appropriate title for this table?
Between which two stages did our solar system form?
How soon did protons and neutrons form after the beginning of the universe?
The major evidence supporting the Big Bang theory is
At approximately which position is Earth's solar system located?
Cosmic background radiation provides direct evidence for the origin of
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