Mostly of hydrogen ... over 95 %.
The nebular hypothesis posits that our solar system formed from a large rotating cloud of dust and gas composed mostly of hydrogen and helium, leftover from previous supernova explosions. Over time, gravity caused the cloud to collapse and form a protostar at its center, with a surrounding disk from which planets eventually coalesced.
The three main theories on the origin of the Earth are the nebular hypothesis, the giant impact hypothesis, and the core accretion theory. The nebular hypothesis proposes that the solar system formed from a rotating cloud of dust and gas, while the giant impact hypothesis suggests that Earth formed from a collision between a Mars-sized protoplanet and the early Earth. The core accretion theory posits that planets formed from the gradual accumulation of solid particles in a protoplanetary disk.
The nebular theory was proposed by the philosopher Immanuel Kant and later expanded upon by the mathematician Pierre-Simon Laplace in the 18th century. It suggests that the solar system formed from a rotating cloud of gas and dust.
The prevailing scientific model for the original formation of Earth is the nebular hypothesis. It suggests that the Sun and planets in our solar system formed from a rotating disk of dust and gas about 4.6 billion years ago. Over time, gravity caused this material to come together and form the Earth and other celestial bodies.
Some scientific theories explaining the origin of Earth include the nebular hypothesis, which suggests that the solar system formed from a rotating disk of gas and dust, and the giant impact hypothesis, which proposes that the Moon formed from debris created by a collision between Earth and a Mars-sized protoplanet. Other theories include the core accretion model for planet formation and the theory of planetary migration.
hydrogen and helium
hydrogen and helium
hydrogen and helium
hydrogen and helium
hydrogen and helium
The nebular hypothesis posits that our solar system formed from a large rotating cloud of dust and gas composed mostly of hydrogen and helium, leftover from previous supernova explosions. Over time, gravity caused the cloud to collapse and form a protostar at its center, with a surrounding disk from which planets eventually coalesced.
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.
The three main theories on the origin of the Earth are the nebular hypothesis, the giant impact hypothesis, and the core accretion theory. The nebular hypothesis proposes that the solar system formed from a rotating cloud of dust and gas, while the giant impact hypothesis suggests that Earth formed from a collision between a Mars-sized protoplanet and the early Earth. The core accretion theory posits that planets formed from the gradual accumulation of solid particles in a protoplanetary disk.
The most widely accepted model for the formation of the solar system is the nebular hypothesis. This theory suggests that the solar system formed from a rotating mass of gas and dust known as the solar nebula, which collapsed under its own gravity to form the Sun and surrounding planets approximately 4.6 billion years ago.
The hypothesis on how the solar system was formed is known as the solar nebula theory. This theory posits that the solar system formed from a massive, rotating cloud of gas and dust called the solar nebula. Over time, gravity caused the material in the nebula to clump together, eventually forming the sun and the planets.
The nebular hypothesis attempts to explain the formation and evolution of the solar system. It posits that the solar system formed from a rotating cloud of gas and dust, known as a solar nebula, which collapsed under its own gravity. As the nebula contracted, it spun faster, flattening into a disk and eventually leading to the formation of the Sun at its center and the planets from the remaining material. This hypothesis addresses the structure and dynamics of planetary systems and their development over time.
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.