The correct option is Fred Hoyle.
Explanation
The "Steady State" theory is a cosmological model concerning the evolution of the universe. Unlike the Big Bang theory, which suggests a singular beginning, the Steady State theory posits that the universe has no beginning or end. It suggests that although the universe is expanding, it maintains a constant average density because new matter is continuously created to fill the voids left by the expansion.
Analysis of Options:
- Edwin Hubble Edwin Hubble: Incorrect. Edwin Hubble provided the observational evidence for the expanding universe (Hubble’s Law) through the redshift of galaxies. His work laid the foundation for the Big Bang theory, which the Steady State theory opposes.
- Immanuel Kant Immanuel Kant: Incorrect. Immanuel Kant is associated with the Nebular Hypothesis (1755), which explains the origin of the Solar System from a primordial cloud of gas and dust, not the Steady State theory of the universe.
- Fred Hoyle Fred Hoyle: Correct. The Steady State theory was proposed in 1948 by Fred Hoyle, along with Hermann Bondi and Thomas Gold. Hoyle argued that the universe is eternal and unchanging in its large-scale structure. Ironically, Hoyle also coined the term "Big Bang" during a radio broadcast to mock the opposing theory.
- Carl Weizsäcker Carl Weizsäcker: Incorrect. Carl Weizsäcker is known for revising and improving the Nebular Hypothesis regarding the formation of the Solar System, specifically focusing on the role of dust and gas friction.
Key Takeaway:
Fred Hoyle is the primary proponent of the Steady State Theory, which claims the universe is expanding but maintains constant density through the continuous creation of matter, serving as a historical alternative to the Big Bang theory.