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Correct Answer: D) Co2+.
Correct Answer: D) All of the above.
Correct Answer: A) Spiral.
Correct Answer: A) Tycho Brahe.
Correct Answer: B) Pennywise.
Correct Answer: A) Kepler.
Correct Answer: B) Cosmic microwave background radiation.
Correct Answer: C) Hydrogen.
Correct Answer: B) 24%.
Correct Answer: C) Nicolaus Copernicus.
Correct Answer: D) All waves in the electromagnetic spectrum.
Correct Answer: D) Copernicus.
Correct Answer: A) Density & Temperature Changes.
Correct Answer: A) Black holes.
Correct Answer: A) Has cooled to about 2.7 Kelvin.
Correct Answer: D) Hydrogen and helium.
Correct Answer: C) Fred Hoyle.
Correct Answer: C) Any type of wave.
Correct Answer: C) Cosmic Microwave Background & He abundance.
Correct Answer: A) Edwin Hubble.
Correct Answer: B) Expanding.
Correct Answer: C) Energy.
Correct Answer: D) 13.8 billion.
Correct Answer: A) No.
Correct Answer: A) ISOTOPES.