Chapter Four
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Atmosphere
The layer of gas surrounding the earth, composed of 78% nitrogen, 21% oxygen, and small amounts of other gasses.
Big Bang
The theoretical origin of the universe as an immense explosion of energy from a single point; occurred 13.8 billion years ago according to widely accepted theory.
Fine-tuning
The fact that throughout nature many physical constants are set at just the right values to enable complex life to exist on earth; if any of these values were different by even a small amount, life could not exist.
Galaxy
A large spiral structure in outer space consisting of some 100 billion stars. There are about 100 billion galaxies in the known universe.
Laws of nature
The orderly and and very mathematical system of rule that objects obey; a manifestation of the intelligence in nature that points to the Creator.
Solar system
The sun and other planets, along with the planets’ moons and other smaller bodies.