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Astrophysicists analyzing cosmic radiation detect a highly uniform microwave signal with a blackbody spectrum corresponding to a temperature of 2.73 Kelvin across all directions of space. Which fundamental theory of space systems does this phenomenon directly support?

The Steady State model, showing continuous creation of matter in static space The Big Bang theory, representing relic thermal radiation from the early expanding universe Kepler's Second Law, demonstrating thermal energy conservation in planetary orbits The Nebular Hypothesis, proving solar system accretion from cold interstellar gas

Correct Answer:

The Big Bang theory, representing relic thermal radiation from the early expanding universe

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