The Interstellar Dust Hypothesis of Otto Schmidt is based on the earlier views of which scientists ?

Question

Accepted Answer

The Interstellar Dust Hypothesis of Otto Schmidt, which proposes that the solar system formed from a rotating cloud of interstellar dust and gas, builds upon the earlier nebular hypothesis. Option 3, Kant and Laplace, is correct because Immanuel Kant and Pierre-Simon Laplace were the originators of the nebular hypothesis. Their hypothesis, proposed in the 18th century, suggested that the solar system formed from a rotating cloud of gas and dust that collapsed under its own gravity. Schmidt's Interstellar Dust Hypothesis is essentially a modern refinement and extension of this original nebular hypothesis, incorporating the idea that the material came from interstellar space. Therefore, Schmidt's work is directly based on and expands upon the foundational ideas of Kant and Laplace.

Here's why the other options are incorrect:

*   **Option 1: Jeans and Jeffreys:** Jeans and Jeffreys proposed the "tidal theory" or "encounter hypothesis," which suggested that the planets formed from material drawn out of the Sun by the gravitational pull of a passing star. This is a fundamentally different mechanism than the nebular hypothesis and the interstellar dust hypothesis, which involve a rotating cloud of material.

*   **Option 2: Hoyle and Lyttleton:** Hoyle and Lyttleton are known for their work on accretion processes and stellar nucleosynthesis. While they contributed to astrophysics, their specific theories regarding the formation of the solar system are not the direct basis for Schmidt's Interstellar Dust Hypothesis in the same way that Kant and Laplace's nebular hypothesis is. They focused more on the formation of stars themselves and the elements within them.

*   **Option 4: Russel:** Henry Norris Russel was a prominent astronomer known for his work on stellar classification and the Hertzsprung-Russell diagram. While his contributions to astronomy are significant, he did not propose a theory of solar system formation that directly influenced Schmidt's Interstellar Dust Hypothesis. His work was primarily focused on understanding the properties and evolution of stars.