Consistent with theory: The statement describes a discovery that we could reasonably expect to find if the nebular theory is correct. ... Consistent with theory: – Beyond its jovian planets, a star has two ice-rich objects as large as Mars . -A star has 20 planets. -A star is surrounded by a disk of gas but has no planets.
What does the nebular theory predict?
The nebular theory predicted the existence of the Kuiper belt 40 years before it was discovered ! There were many more leftover planetesimals than we see today. Most of them collided with the newly-formed planets & moons during the first few 108 years of the Solar System.
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 most important attribute of the nebular theory?
When it comes to the formation of our Solar System, the most widely accepted view is known as the Nebular Hypothesis. In essence, this theory states that the Sun, the planets, and all other objects in the Solar System formed from nebulous material billions of years ago .
What is solar nebula theory all about?
The solar nebular hypothesis describes the formation of our solar system from a nebula cloud made from a collection of dust and gas . It is believed that the sun, planets, moons, and asteroids were formed around the same time around 4.5 billion years ago from a nebula.
What are the steps of nebular theory?
- Condensation.
- Accretion.
How does the nebular theory work?
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 . ... The Sun-to-be collected most of the mass in the nebula’s center, forming a Protostar .
Are there exceptions to the nebular theory?
Swarms of asteroids and comets populate the solar system. Notable exceptions to these trends stand out (unusual rotation axis tilts, large moons, unusual orbits).
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.
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.
What does the capture theory explain?
Capture theory suggests that the Moon was a wandering body (like an asteroid) that formed elsewhere in the solar system and was captured by Earth’s gravity as it passed nearby . ... It proposes that the Moon formed during a collision between the Earth and another small planet, about the size of Mars.
What is the difference of planetesimal and tidal theory?
According to the planetesimal theory developed by T. C. ... The tidal theory, proposed by James Jeans and Harold Jeffreys in 1918, is a variation of the planetesimal concept: it suggests that a huge tidal wave, raised on the sun by a passing star, was drawn into a long filament and became detached from the principal mass.
What is the passing star theory?
Passing Star Theory
A star with a greater gravitational pull passed near the sun . It attracted large quantities of gaseous materials from the sun. The materials split, cooled and condensed to form planets.
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 is the difference between nebula and solar nebula?
A nebula is a cloud in deep space consisting of gas or dirt/dust (e.g. cloud formed after a star explodes). Solar Nebula is the cloud of gas and dust that began to collapse about 5 billion years ago to form the solar system. Solar nebula is a massive cloud of gas and dust.
What holds the solar system together?
Our Sun – the heart of our solar system – is a yellow dwarf star, a hot ball of glowing gases. Its gravity holds the solar system together, keeping everything from the biggest planets to the smallest particles of debris in its orbit.
