Most of the collapsing mass collected in the center, forming the Sun, while the rest flattened into a protoplanetary disk out of which the planets, moons, asteroids, and other small Solar System …

Jan 3, 2026 · The current approach to the origin of the solar system treats it as part of the general process of star formation. As observational information has steadily increased, the field of …

The solar system as we know it began life as a vast, swirling cloud of gas and dust, twisting through the universe without direction or form. About 4.6 billion years ago, this gigantic cloud …

Jan 7, 2026 · The Solar system formed through condensation from big clouds of gas and dust called nebulae after a supernova, or the explosion of a large star. Planets move around the …

This illustration shows the steps in the formation of the solar system from the solar nebula. As the nebula shrinks, its rotation causes it to flatten into a disk.

Jan 7, 2026 · The Nebular Theory is the leading scientific explanation for the formation of our solar system approximately 4.6 billion years ago. This widely accepted model posits that the …

Dec 8, 2025 · The formation of the Solar System is believed to have begun about 4.6 billion years ago from a giant cloud of gas and dust known as the solar nebula. This cloud collapsed under …

All of the main building blocks for life -- carbon, hydrogen, oxygen and nitrogen (CHONs) -- were present in the cloud that collapsed to form our solar system. Ultimately, this concentration of …

Click the image on the left for a video of a simulated formation of a system of planets. This particular simulation demonstrates the Solar Nebula Hypothesis - the formation of our Solar …

Nebular hypothesis ... The nebular hypothesis is the most widely accepted model in the field of cosmogony to explain the formation and evolution of the Solar System (as well as other …