What are the steps of 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 6 stages of Nebular Theory?

Terms in this set (6)

• Formation begins and gravity causes the nebula to contract. …
• gravity pulls in the mass of the nebula in, then starts spinning, then the disk forms (planetary, solar disk); gravitational energy gets converted to thermal energy (heat); gets so hot, then nuclear fusion, then the sun is born.

How many steps are in the Nebular Theory?

7 Steps of the Nebular Theory.

What are the 7 steps of the Nebular Theory?

Terms in this set (7)

Over time the remaining gas and dust begins to rotate around this center. Particles grown in size and become planetesimals. Gravity attracts more gas and dust and the solar nebula flattens out into a vast rotating disk. Accretion between planetesimals continues and planets form.

What is the first step in nebular hypothesis?

step 1. the birth of our solar system began as dust and gases (nebula) started to gravitationally collapse. step 2. the nebula contracted into a rotating disk that was heated by the conversion of gravitational energy into thermal energy. step 3.

What are the steps in forming a solar system?

After becoming distinct planets, they went through four stages of formation: Differentiation, Cratering, Flooding and Surface Evolution.

What process formed the planets in the protoplanetary disc?

The nebular hypothesis of solar system formation describes how protoplanetary disks are thought to evolve into planetary systems. Electrostatic and gravitational interactions may cause the dust and ice grains in the disk to accrete into planetesimals.

What is protoplanetary hypothesis?

How did the Solar System’s planets come to be? The leading theory is something known as the “protoplanet hypothesis”, which essentially says that very small objects stuck to each other and grew bigger and bigger — big enough to even form the gas giants, such as Jupiter.

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 are the 4 main types of materials that compose protoplanetary disks?

The material in the disks is thought to consist mainly of gas (99% by mass), predominantly molecular hydrogen and helium with trace amounts of CO and other molecules, and small dust particles (1% by mass).

What is the process of accretion?

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.

How are debris disks detected?

They are usually discovered by examining the star system in infrared light and looking for an excess of radiation beyond that emitted by the star. This excess is inferred to be radiation from the star that has been absorbed by the dust in the disk, then re-radiated away as infrared energy.

Why do protoplanetary disks spin?

Theory predicts that as a molecular cloud collapses toward a single point, pre-existing motion within the cloud will cause the collapsing mass to begin rotating. As it rotates, what would otherwise be spherical flattens for form a rotating disk with a central bulge.

How do rocky planets form within the protoplanetary disk?

After the sun was born, the rest of the solar system emerged from a giant rotating cloud of gas and dust known as the protoplanetary disk. The researchers found that, as chondrules moved through gas in this disk, the friction between the particles and the gas slowed down the chondrules, allowing them to cluster.

How do temperature differences in the protoplanetary disk?

Explanation: The inner area of a protoplanetary disk is closer to the sun and is hotter. This means that volatile substances are gases. The gases tend to get moved to the outer regions by the solar wind.

Who discovered protoplanetary disk?

Hubble

Astronomers used Hubble to confirm that planets form in dust disks around stars. The telescope first resolved protoplanetary disks around nearly 200 stars in the bright Orion Nebula.

How long does it take for a protoplanetary disk to form?

A protoplanetary disk is a rotating circumstellar disk of dense gas surrounding a young newly formed star, i.e. a TTS. If the disk is massive enough, the runaway accretions begin resulting in the rapid—100,000–300,000 years—formation of Moon- to Mars-sized planetary embryos.

Why did solar nebula flatten into a disk?

Why did the solar nebula flatten into a disk? The force of gravity from the planets pulled the material downward into a flat disk. It flattened as a natural consequence of collisions between particles in the spinning nebula, changing random motions into more orderly ones.

How do stars form out of a nebula?

Star Forming Nebula

These knots contain sufficient mass that the gas and dust can begin to collapse from gravitational attraction. As it collapses, pressure from gravity causes the material at the center to heat up, creating a protostar. One day, this core becomes hot enough to ignite fusion and a star is born.

How are stars made step by step?

Stars form from an accumulation of gas and dust, which collapses due to gravity and starts to form stars. The process of star formation takes around a million years from the time the initial gas cloud starts to collapse until the star is created and shines like the Sun.

What are the stages of star?

Seven Main Stages of a Star

• Giant Gas Cloud. A star originates from a large cloud of gas. …
• Protostar. When the gas particles in the molecular cloud run into each other, heat energy is produced. …
• T-Tauri Phase. …
• Main Sequence. …
• Red Giant. …
• The Fusion of Heavier Elements. …
• Supernovae and Planetary Nebulae.

How does a nebula work?

The dust and gases in a nebula are very spread out, but gravity can slowly begin to pull together clumps of dust and gas. As these clumps get bigger and bigger, their gravity gets stronger and stronger. Eventually, the clump of dust and gas gets so big that it collapses from its own gravity.

What happens during the nebula stage of a star?

The planetary nebula phase is a final stage in a low-mass star’s life. During this phase, the star sheds its outer layers. This creates an expanding, glowing shell of very hot gas. Despite the name, they have nothing to do with planets.

How is a nebula formed?

Nebula Formation:

In essence, a nebula is formed when portions of the interstellar medium undergo gravitational collapse. Mutual gravitational attraction causes matter to clump together, forming regions of greater and greater density.

What is a nebula and what does it do?

A nebula is an enormous cloud of dust and gas occupying the space between stars and acting as a nursery for new stars. 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.

What are the four main types of nebulae?

These are emission nebulae, reflection nebulae, dark nebulae, planetary nebulae, and supernova remnants. Emission and reflection nebulae tend to be fuzzy in appearance and lack any noticeable shape or structure. They are also known as diffuse nebulae.

How do you identify a nebulae?

To find the nebula, look below the three stars of Orion’s Belt (or above, if viewing from the southern hemisphere). You will see a faint line of stars, which make up Orion’s sword. The nebula is halfway down the sword and will appear as a fuzzy-looking star. Looking for stargazing tips?