What is the formation process of the solar system?
The Sun and the planets formed together, 4.6 billion years ago, from a cloud of gas and dust called the solar nebula. A shock wave from a nearby supernova explosion probably initiated the collapse of the solar nebula. The Sun formed in the center, and the planets formed in a thin disk orbiting around it.
How did the Protosun form?
The protosun formed at the center of the protosolar nebula. Rotation supported this nebula as it collapsed. Dust grains flew through the nebula and collected into a thin disk of material. Gravitational instability caused the disk to break up into small particles (planetesimals).
What caused the Protosun to form in the solar nebula?
The cloud contracted under its own gravity and our proto-Sun formed in the hot dense center. The remainder of the cloud formed a swirling disk called the solar nebula. Within the solar nebula, scientists believe that dust and ice particles embedded in the gas moved, occasionally colliding and clumping together.
When did the Protosun form?
4.6 billion years ago: A group of protostars, one of which will become the Sun, form from a cloud of debris left by prior star explosions in the Milky Way. 4.59 billion years ago: The giant planets Jupiter, Saturn, Uranus, and Neptune form around the protosun.
What are the 4 stages of solar system formation?
Scientists believe that terrestrial planets, like Earth, formed by clumping together from dust and gas into into hot blobs of molten metal and rock several billion years ago. After becoming distinct planets, they went through four stages of formation: Differentiation, Cratering, Flooding and Surface Evolution.
Which lists the major steps of solar system formation in the correct order?
Which lists the major steps of solar system formation in the correct order? Collapse, Condensation, Accretion.
What was the Protosun what caused it to shine into what did it evolve?
The protosun, meanwhile, continued to contract under its own gravity and grew hotter, developing into a young star. That star, our sun, emanated a hot wind of electrically charged atoms that blew most of the gas and dust that remained from the nebula out of the solar system.
Is Protosun and protostar the same?
Gravitational contraction: Initially, as gas molecules and particles of dust plunged toward the center to form the protosun (our protostar), it shone brightly from the heat produced by their friction.
What is the protostar stage?
A protostar is a very young star that is still gathering mass from its parent molecular cloud. The protostellar phase is the earliest one in the process of stellar evolution. For a low-mass star (i.e. that of the Sun or lower), it lasts about 500,000 years.
What is a Protosun?
Definition of protosun : protostar especially : the gaseous cloud that underwent gravitational collapse to form the sun.
What is the first stage of planet formation?
differentiation
The first stage of planetary development is called differentiation, the settling of dense material, like iron-rich minerals, into the center of a planet and the rising of less dense material, such as silicon-rich minerals, to the surface of one.
What is happening during the second stage of solar system formation?
The second stage of planetary development is known as cratering, the bombardment of the early Earth by celestial objects, like asteroids. In the early solar system, there were plenty of rocky bodies floating about that cratered the heck out of the terrestrial planets and the moon.
What is the protoplanet theory?
protoplanet, in astronomical theory, a hypothetical eddy in a whirling cloud of gas or dust that becomes a planet by condensation during formation of a solar system.
What happens during the protostar stage?
The protostar phase is the earliest one in the process of stellar evolution. The phase begins when a molecular cloud fragment first collapses under the force of self-gravity and an opaque, pressure supported core forms inside the collapsing fragment.
How do protostars generate energy?
Protostars also generate energy, but it comes from the radiation liberated at the shocks on its surface and on the surface of its surrounding disk. The radiation thus created must traverse the interstellar dust in the surrounding dense core.
What happens during the protostar phase?
How does a protostar become a main sequence star?
A protostar becomes a main sequence star when its core temperature exceeds 10 million K. This is the temperature needed for hydrogen fusion to operate efficiently. The length of time all of this takes depends on the mass of the star. The more massive the star, the faster everything happens.
What are the steps of the Earth formation?
Step 1: accretion of cm sized particles. Step 2: Physical Collision on km scale. Step 3: Gravitational accretion on 10-100 km scale. Step 4: Molten protoplanet from the heat of accretion.