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What are four key features of our solar system that any theory of solar system formation must be able to explain?

What are four key features of our solar system that any theory of solar system formation must be able to explain? There are vast numbers of asteroids and comets. There are clear patterns to the rotation and orbits of large bodies in the solar system. There are a few notable “exceptions to the rules.”

What is the leading theory that explains the formation of the solar system?

nebular hypothesis

What is the formation of our solar system?

Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material.

What do we mean by the frost line when we discuss the formation of planets in the solar nebula?

What do we mean by the frost line when we discuss the formation of planets in the solar nebula? It is a circle at a particular distance from the Sun, beyond which the temperature was low enough for ices to condense.

What was the first step in the formation of the planets?

Approximately 4.6 billion years ago, the solar system was a cloud of dust and gas known as a solar nebula. Gravity collapsed the material in on itself as it began to spin, forming the sun in the center of the nebula.

What is the accretion process?

In planetary science, accretion is the process in which solids agglomerate to form larger and larger objects and eventually planets are produced. The initial conditions are a disc of gas and microscopic solid particles, with a total mass of about 1% of the gas mass. Accretion has to be effective and fast.

What is an example of accretion?

An example of an accretion is the garage someone may build on his home. The definition of accretion is the state of having gone through extension or addition of length or overall size. An example of accretion is a extra part of a fairy tale added over many years of re-telling.

How do you calculate accretion?

To determine the annual accretion, find the difference between the cost of the bond and par value; divide the result by the original number of years to maturity.

What is the meaning of nebular hypothesis?

Our solar system formed at the same time as our Sun as described in the nebular hypothesis. The nebular hypothesis is the idea that a spinning cloud of dust made of mostly light elements, called a nebula, flattened into a protoplanetary disk, and became a solar system consisting of a star with orbiting planets [12].

What are the five steps of the nebular hypothesis?

Terms in this set (5)

  • step one(4) -The solar nebula consisted of. -hydrogen,
  • step two(2) -A disturbance.
  • step three(2) -The solar nebula assumed a flat, disk shape.
  • step four(2) -Inner planets began to form from metallic.
  • step five(2) -Larger outer planets began forming from fragments.

What are the main events of the nebular hypothesis?

The Nebular Theory would have started with a cloud of gas and dust, most likely left over from a previous supernova. The nebula started to collapse and condense; this collapsing process continued for some time. The Sun-to-be collected most of the mass in the nebula’s center, forming a Protostar .

Why is the nebular hypothesis accepted?

This theory is widely accepted to account for the formation of stars and planetary systems such as ours. The first version of the nebular hypothesis was proposed in 1755 by the German philosopher Immanuel Kant and modified in 1796 by Pierre Laplace.

What is the evidence of nebular theory?

What Evidence do we have of a Nebular Theory-type development? We have observed discs of gas and dust around other stars. We can also see evidence of stars and planets forming in clouds of gas and dust; young planet systems in the making are called Proplyds.

What are the 6 stages of nebular theory?

  • Nebula, protosun forming, spinning planetary disk, protoplanets forming,
  • Shock waves from a nearby supernova explosion.
  • It also begins to flatten.
  • Protosun.
  • When the gravitational forces begin to fuse hydrogen into helium (fusion)
  • Protoplanets.
  • Inner protoplanets – most of their lightweight gases are boiled away,

What is the evidence that supports the nebular hypothesis?

The types of objects found within the solar system provide significant clues and evidence to support the Nebular Theory. Comets, asteroids, and meteorites recovered on Earth also provide a number of clues and evidence of Nebular-type development.

Why was the nebular hypothesis rejected?

The main problem involved angular momentum distribution between the Sun and planets. The planets have 99% of the angular momentum, and this fact could not be explained by the nebular model. As a result, astronomers largely abandoned this theory of planet formation at the beginning of the 20th century.

Which two observed characteristics of our solar system are explained by the nebular hypothesis?

The solar nebula hypothesis states that the outer planets were able to collect hydrogen within their gravity, while closer to the sun, most of the hydrogen was blown away by solar winds, leaving less hydrogen and exposing the rocky core.

What are the four theories of the solar system?

The origin of the Solar System

  • The origin of the Solar System. How did the Sun, planets and moons in the Solar System form?
  • What are the theories for the origin of the Solar System?
  • The Accretion theory.
  • The Protoplanet theory.
  • The Capture theory.
  • The Modern Laplacian theory.
  • The Modern Nebular theory.
  • Conclusion.

What are the 3 theories of the solar system?

Find out more below.

  • The Accretion theory. The Sun passes through a dense interstellar cloud and emerges surrounded by a dusty, gaseous envelope.
  • The Protoplanet theory. A dense interstellar cloud produces a cluster of stars.
  • The Capture theory.

What are the two theories on how the solar system began?

Because the theory of Laplace incorporated Kant’s idea of planets coalescing from dispersed material, their two approaches are often combined in a single model called the Kant-Laplace nebular hypothesis. This model for solar system formation was widely accepted for about 100 years.

Why is it important to know the origin of the solar system?

In the process of exploring the birth of the earliest galaxies in the universe, to understand the planetary systems, explore planets that are capable of supporting life, and to learn whether life began elsewhere in the solar system have helped us advance and build our civilization.

Who introduced the theory of solar system?

The first recorded use of the term “Solar System” dates from 1704. The current standard theory for Solar System formation, the nebular hypothesis, has fallen into and out of favour since its formulation by Emanuel Swedenborg, Immanuel Kant, and Pierre-Simon Laplace in the 18th century.

Why it is called solar system?

Why Is It Called The “Solar” System? Our planetary system is named the “solar” system because our Sun is named Sol, after the Latin word for Sun, “solis,” and anything related to the Sun we call “solar.” Our planetary system is located in an outer spiral arm of the Milky Way galaxy.

What is the purpose of the solar system?

The Sun’s gravitational force holds the solar system together. It also provides us with light and heat that are powered by nuclear reactions burning constantly inside the Sun. Without this light and heat, there would be no life on Earth — so the Sun is very important to us.

How many planets are there in 2020?


Who named the planets?

Roman mythology is to thank for the monikers of most of the eight planets in the solar system. The Romans bestowed the names of gods and goddesses on the five planets that could be seen in the night sky with the naked eye.