How were the planets in the solar system formed? (1 point)
O The solid materials were forced out of the sun's disc and cooled down.
• The dust particles were attracted by gravity from distant galaxies.
• The gas particles released by the sun were pulled away and became solid.
O The remaining materials from the sun's formation clumped together due to gravity.
• The remaining materials from the sun's formation clumped together due to gravity.
The correct answer is:
• The remaining materials from the sun's formation clumped together due to gravity.
After the sun formed about 4.6 billion years ago, there was a spinning disk of gas and dust surrounding it. This disk is known as the protoplanetary disk. Over time, small particles in the disk called planetesimals began to collide and stick together due to gravity. These planetesimals continued to grow through a process called accretion, where they accumulated more and more material, eventually forming planet-sized objects. These objects are what we now know as the planets in our solar system.
The correct answer is: The remaining materials from the sun's formation clumped together due to gravity.
To understand how the planets in the solar system were formed, we need to look back approximately 4.6 billion years ago to a time when a massive cloud of gas and dust, called the solar nebula, existed. This cloud was a result of the gravitational collapse of a molecular cloud.
As the solar nebula collapsed, it began to spin and flatten into a spinning, rotating disk shape due to conserving angular momentum. At the center of this disk, the protosun, or the early form of our Sun, formed.
Within this rotating disk of gas and dust, solid materials, such as grains of rocks and metals, also began to form. These solid materials are known as planetesimals, and they accumulated through a process called accretion. Accretion is the gradual gathering of particles due to the force of gravity.
Over time, these planetesimals collided with each other, forming larger bodies, known as planetary embryos or protoplanets. These protoplanets continued to grow by attracting more and more nearby planetesimals through their gravitational pull. Eventually, the protoplanets grew large enough to become the planets we know today.
So, the planets in the solar system were formed as the remaining materials in the solar nebula clumped together due to gravity.