How does the idea of rotating disk in the nebular model explain certain observed celestial phenomena ?

It is believed that a large cloud of dust and gas which rotated slowly, began to contract because gravitational forces. Rotation increased causing a bulge in the center. At its end stages the mass of gases that gathered in the center created the sun with the planets forming from the bulge.

10.0 J

if it was 10.01 it would be significant, but its 10.0 which makes it a whole number