Jupiter’s moons and rings create forces that block
nuclear fusion
on the planet. An alternative to the nebular theory for the formation of the solar system suggests that the planets formed from blobs of gas that had been gravitationally pulled out of the Sun during the near-collision with another star.
How was the solar system formed according to the nebular theory?
The nebular theory states that
our solar system formed from the gravitational collapse of a giant interstellar gas cloud—the solar nebula
. – (Nebula is the Latin word for cloud.) Kant and Laplace proposed the nebular hypothesis over two centuries ago.
What is the nebular theory and how does it support formation of our solar system?
The nebular theory holds that
our Solar System formed out of a nebula which collapsed under its own gravity
. – We observe stars in the process of forming today. – The are always found within interstellar clouds of gas.
What are the steps of the nebular theory?
- 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 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 is the theory solar nebula?
Solar nebula, gaseous cloud from which, in the so-called nebular hypothesis of the origin of the solar system,
the Sun and planets formed by condensation
. Swedish philosopher Emanuel Swedenborg in 1734 proposed that the planets formed out of a nebular crust that had surrounded the Sun and then broken apart.
What are the 4 steps of the nebular hypothesis?
- 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.
Why was the nebular theory 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.
Why is nebular theory important?
Currently the best theory is the Nebular Theory . This states that
the solar system developed out of an interstellar cloud of dust and gas, called a nebula
. This theory best accounts for the objects we currently find in the Solar System and the distribution of these objects.
What supports the nebular theory?
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.
What is the difference between nebular hypothesis and solar nebular theory?
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). … The widely accepted modern variant of the nebular theory is the solar nebular disk model (SNDM) or solar nebular model.
What gases are in a nebula?
The roots of the word come from Latin nebula, which means a “mist, vapor, fog, smoke, exhalation.” Nebulae are made up of
dust, basic elements such as hydrogen and other ionized gases
. They either form through clouds of cold interstellar gas and dust or through the aftermath of a supernova.
What material is used in the solar nebula?
The solar nebula is initially
a thin gas of hydrogen and helium strewn with tiny dust particles
. These tiny grains serve as the building blocks of the planets. Dust grains play an important role in the evolution of any gas cloud. These grains act as condensation nuclei, on which accretion of matter occurs.
How did dust cool the early solar nebula?
Squeezing made the cloud start to collapse, as gravity pulled the gas and dust together, forming a solar nebula. … Eventually, the cloud grew hotter and denser in the center, with
a disk of gas and dust surrounding
it that was hot in the center but cool at the edges.
What causes nebula to begin to contract?
A nebula (gas cloud) slowly contracts
under the mutual gravity of all of the atoms in the cloud
. … Gravitational contraction also causes the pressure to increase which causes the cloud to heat up. Mass concentrates into the center and pressures and temperatures here become the greatest.
What causes a solar nebula?
Formation. 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.
