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Exam 81: The Edges of the Universe

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Exam 1: Our Planetary Neighborhood8 Questionsadd course
Exam 2: Beyond the Solar System8 Questionsadd course
Exam 3: Astronomical Numbers6 Questionsadd course
Exam 4: Scientific Foundations of Astronomy7 Questionsadd course
Exam 5: The Night Sky8 Questionsadd course
Exam 6: The Year8 Questionsadd course
Exam 7: The Time of Day8 Questionsadd course
Exam 8: Lunar Cycles8 Questionsadd course
Exam 9: Calendars8 Questionsadd course
Exam 10: Geometry of the Moon, Earth, and Sun8 Questionsadd course
Exam 11: Planets: The Wandering Stars7 Questionsadd course
Exam 12: The Beginnings of Modern Astronomy8 Questionsadd course
Exam 13: Observing the Sky8 Questionsadd course
Exam 14: Astronomical Motion: Inertia, Mass, and Force7 Questionsadd course
Exam 15: Force, Acceleration, and Interaction8 Questionsadd course
Exam 16: The Universal Law of Gravity8 Questionsadd course
Exam 17: Measuring a Bodys Mass Using Orbital Motion8 Questionsadd course
Exam 18: Orbital and Escape Velocities8 Questionsadd course
Exam 19: Tides8 Questionsadd course
Exam 20: Conservation Laws7 Questionsadd course
Exam 21: The Dual Nature of Light and Matter8 Questionsadd course
Exam 22: The Electromagnetic Spectrum7 Questionsadd course
Exam 23: Thermal Radiation8 Questionsadd course
Exam 24: Identifying Atoms by Their Spectra8 Questionsadd course
Exam 25: The Doppler Shift8 Questionsadd course
Exam 26: Special Relativity8 Questionsadd course
Exam 27: General Relativity7 Questionsadd course
Exam 28: Detecting Light - an Overview7 Questionsadd course
Exam 29: Collecting Light8 Questionsadd course
Exam 30: Focusing Light8 Questionsadd course
Exam 31: Telescope Resolution8 Questionsadd course
Exam 32: The Earths Atmosphere and Space Observatories8 Questionsadd course
Exam 33: Amateur Astronomy7 Questionsadd course
Exam 34: The Structure of the Solar System8 Questionsadd course
Exam 35: The Origin of the Solar System7 Questionsadd course
Exam 36: Other Planetary Systems8 Questionsadd course
Exam 37: The Earth As a Terrestrial Planet8 Questionsadd course
Exam 38: Earths Atmosphere and Hydrosphere8 Questionsadd course
Exam 39: Our Moon8 Questionsadd course
Exam 40: Mercury8 Questionsadd course
Exam 41: Venus8 Questionsadd course
Exam 42: Mars7 Questionsadd course
Exam 43: Asteroids8 Questionsadd course
Exam 44: Comparative Planetology8 Questionsadd course
Exam 45: Jupiter and Saturn: Gas Giants8 Questionsadd course
Exam 46: Uranus and Neptune: Ice Giants8 Questionsadd course
Exam 47: Satellite Systems and Rings8 Questionsadd course
Exam 48: Ice Worlds, Pluto, and Beyond8 Questionsadd course
Exam 49: Comets8 Questionsadd course
Exam 50: Impacts on Earth8 Questionsadd course
Exam 51: The Sun, Our Star8 Questionsadd course
Exam 52: The Suns Source of Power8 Questionsadd course
Exam 53: Solar Activity8 Questionsadd course
Exam 54: Surveying the Stars8 Questionsadd course
Exam 55: The Luminosities of Stars8 Questionsadd course
Exam 56: The Temperatures and Compositions of Stars8 Questionsadd course
Exam 57: The Masses of Orbiting Stars7 Questionsadd course
Exam 58: The Sizes of Stars8 Questionsadd course
Exam 59: The H-R Diagram8 Questionsadd course
Exam 60: Overview of Stellar Evolution7 Questionsadd course
Exam 61: Star Formation8 Questionsadd course
Exam 62: Main-Sequence Stars8 Questionsadd course
Exam 63: Giant Stars8 Questionsadd course
Exam 64: Variable Stars8 Questionsadd course
Exam 65: Mass Loss and Death of Low-Mass Stars8 Questionsadd course
Exam 66: Exploding White Dwarfs8 Questionsadd course
Exam 67: Old Age and Death of Massive Stars7 Questionsadd course
Exam 68: Neutron Stars8 Questionsadd course
Exam 69: Black Holes8 Questionsadd course
Exam 70: Star Clusters8 Questionsadd course
Exam 71: Discovering the Milky Way8 Questionsadd course
Exam 72: Stars of the Milky Way8 Questionsadd course
Exam 73: Gas and Dust in the Milky Way8 Questionsadd course
Exam 74: Mass and Motions in the Milky Way8 Questionsadd course
Exam 75: A Universe of Galaxies8 Questionsadd course
Exam 76: Types of Galaxies8 Questionsadd course
Exam 77: Galaxy Clustering8 Questionsadd course
Exam 78: Active Galactic Nuclei8 Questionsadd course
Exam 79: Dark Matter8 Questionsadd course
Exam 80: Cosmology7 Questionsadd course
Exam 81: The Edges of the Universe8 Questionsadd course
Exam 82: The Curvature and Expansion of Universes8 Questionsadd course
Exam 83: The Beginnings of the Universe8 Questionsadd course
Exam 84: Dark Energy and the Fate of the Universe8 Questionsadd course
Exam 85: Astrobiology8 Questionsadd course
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When photons had their last interactions with the big bang gas is the ___________________.

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last scattering epoch

The remnant of the beginning of the universe is called the _______.

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CMB - cosmic microwave background

The cosmic microwave background is

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D

His question made a paradox of why the universe is not infinite in all aspects:

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Dark matter began clumping even before the last scattering epoch.

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The universe has matter evenly distributed; this principle is called _____.

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The CMB is about 3K.

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The maximum distance that light can travel during the age of the universe is called ______.

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