The Formation Of The Solar System: Theories Old... (DELUXE × 2025)

As the nebula collapsed, it spun faster and flattened into a disk, with the Sun forming at the hot, dense center.

Before the Nebular Hypothesis became the standard, other "catastrophic" theories were popular: History of Solar System formation and evolution hypotheses The Formation of the Solar System: Theories Old...

In the cooler outer regions of this disk, dust grains collided and stuck together, eventually growing into planetesimals and then full planets. Old Theories: Catastrophic Encounters As the nebula collapsed, it spun faster and