The dust cloud theory is not a specific theory with a single inventor. It's more of a concept that evolved over time, building on the work of various scientists.

Here's a breakdown:

* Early ideas: In the early 20th century, scientists like James Jeans and Thomas Chamberlin proposed that stars could form from the collapse of cold, diffuse clouds of gas and dust.

* Modern development: In the mid-20th century, scientists like Victor Safronov and George Wetherill further developed these ideas, incorporating the concept of accretion, where smaller particles clump together to form larger bodies. This is the foundation of the modern nebular hypothesis of star and planet formation.

Therefore, it's more accurate to say that the dust cloud theory is a culmination of ideas from various scientists over many decades, rather than the invention of a single person.