hydrogen and helium
hydrogen and helium
hydrogen and helium
Nebular model
Our solar system began forming within a concentration of interstellar dust and hydrogen gas called a molecular cloud. The cloud contracted under its own gravity and our proto-Sun formed in the hot dense center called solar nebula
Planets can be formed from nebular gases and dusts around a protostar or from the cooling of small stars.
mostly hydrogen and helium
hydrogen and helium
hydrogen and helium
hydrogen and helium
hydrogen and helium
Mostly of hydrogen ... over 95 %.
nebular hypothesis
The 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 planetary systems). It suggests that the Solar System formed from nebulous material.
It was first proposed in 1734 by Emanuel Swedenborg. Originally applied only to our own Solar System, this method of planetary system formation is now thought to be at work throughout the universe. The widely accepted modern variant of the nebular hypothesis is Solar Nebular Disk Model (SNDM) or simply Solar Nebular Model.
No, nobody uses the term "solar galactic hypothesis". You may be referring to a "solar nebula", in which a cloud of gas and dust collapses under its internal gravity to form a star and perhaps some planets.
in a nebular