There a many hypotheses explaining how the solar system formed. In science class, we learned about three hypotheses explaining the formation of the solar system. We learned about the nebular, protoplanet, and planetisemal hypotheses. In the nebular hypothesis, the solar system started out as a cloud. The cloud of gas cooled and shrank into a sphere. The law of conservation of angular momentum caused the sphere to spin faster. Centrifugal forces caused some of the matter to fly off of the sun. This matter formed a ring around the sun. The matter that was originally a part of the sun cooled and condensed into the planets. One problem with the nebular hypothesis is that an unreasonably large amount of gravitational pull would be needed to condense the rings of matter into planets. Also, the Sun, although containing most of the mass in the solar system, has only a small fraction of the angular momentum. …show more content…
It started five billion years ago as a cloud of dust and gas about 10 billion kilometers in diameter that rotated slowly in space. This massive cloud shrank over time because of its own gravitational pull, or because of an exploding passing star. Most material collected in the center and it rotated faster as it shrank. Compression of the material made it hotter, which started hydrogen fusion, forming the sun. Ten percent of the material in the cloud formed a disk around the sun. Due to friction in the disk, most of the mass collected into whirlpools. These whirlpools shrank to form protoplanets. These protoplanets became planets and moons. Excess material became comets, asteroids, and meteoroids. A problem with this hypothesis is that it would be unlikely for a passing star to explode, because stars are very far apart from each other. Also, as with the nebular hypothesis, it would take an unreasonable amount of gravitational pull for the disk to condense into
Throughout generations stories were passed down about how things could've been created like the earth, mankind, and even the stars. Every culture and religion has their own myth of how things came to be. The Hindu’s, Native American’s, and the Chinese all made up stories about how the stars were created.
the planets fall around the Sun. Each of these objects balances the Sun 's force of gravity
When the sun was a young star, the leftover material formed what would be planetary disks. These are accounted by all the planets in the solar system. Venus was made into the second planet from the sun. Over the next billion years the planet formed. There
Several unresolved problems remain concerning the Orion Nebula. The fate of the protoplanetary disks, for example, is presently impossible to predict. Without a more detailed understanding of how planets actually form, it cannot be assumed that the events within the Orion Nebula are analogous to the events that led to the formation of the planets in the solar system. Furthermore, the detection of water in the nebula has revealed the need to revise the theory of star formation to
Even today, scientists understand very little about the formation of Uranus and Neptune. This made scientists have stated that, "...the possibilities concerning the formation of Uranus and Neptune are almost endless." However, it has been suggested that this planetary system evolved in a very non-conventional manner, as described in the following lines. Planetesimals at the disk's inner edge occasionally passed through gravitational encounters with the outermost giant planet, which calter the planetesimals' orbits. The planets scattered inwards the most of the small icy bodies that they encountered, exchanging angular momentum with the scattered objects so that the planets move outwards in response, preserving the angular momentum of the system.
Over the last centuries, many scientists have discussed about how was the solar system formed, when in the 18th century, Emanuel Swedenborg, Immanuel Kant and Pierre-Simon proposed what we know nowadays as the most widely acknowledge scientific justification of how the solar system was formed: The Nebular Hypothesis.
Stars are born or formed in Nebulae or Nebulas are huge interstellar clouds, in inter-galactic space, of dust and gas (mostly hydrogen H2) There is an abundance of such stellar nurseries in the arms of Spiral Galaxies. The birth of star occurs many atoms of light elements are compressed and squeezed under tremendous pressure and their nuclei undergo fusion. All stars are results of Balanced forces – The force of Gravity will compress atoms in Intergalactic and interstellar gas until such time that fusion reactions begin and once this these fusion reactions start an outward pressure is exerted. Provided that the inward force of gravity and the outward force of the outward fusion reactions remain equal the Stars remains stable. Nebulae are common in our galaxy and in galaxies similar to ours. Nebula
To begin, I will start with the principle, the origin. It all initiated in the course of the time when the Earth was formed 4.5 billion years ago. Other planets were progressing to form and generate contact with Earth. In the process of making contact with Earth, it blew out rocks and debris. Most of the remains went into orbit around the Earth and formed into the Moon.
was forming it was a giant ball made of liquid molten. Over a long period of time asteroids hit
As humans we have always try to understand how the universe really works. How does the moon form? How does water really flow? How did the earth form? To provide some explanation on how the stars and the planet worked Nicolaus Corpernicus “an astronomer and mathematician” created “his own celestial model of a heliocentric planetary system.” His theory was there are multiple Center in the celestial sphere where the moon and stars exist. The earth is the center and the planets does not rotate around it. The sun is close to the midpoint of the world, but the spheres doesn’t rotate around it either. The stars are located on a permanent sphere, which is considered the firmament and does not move, and the earth has multiple motion which not only
To explain how the origins of galaxies and stars, we must go back to the previous threshold: the big bang. Gravity was one of the four fundamental forces that came from the big bang, and as a result, plays a central role in the formation of stars and galaxies as it has the ability to change something else. Gravity holds the ability to garner more mass when there is more mass involved and vice versa, this leads to a different effect of different areas depending on mass. Like stars, stars begin very small, just particles in vast clouds of dust and gas. These ‘nebulae’ remain cold for ages until an external force come through and causes a disturbance. As the force moves through the cloud, particles collide and clump together. These clumps then gain more mass, and as I mentioned above, a stronger gravitational pull, attracting, even more, particles. as these clumps grow, the center grows denser and hotter. This is a long process, it takes a few million years before it moves onto the next stage: the protostar. This process will continue as the protostar grows until the center becomes too hot, then its hydrogen atoms begin to fuse which produce an influx of helium and energy. This reaction is called nuclear fusions, and while it may sound as the changing factor, but this outflux of energy is still weaker than the inward pull of gravity. The turning point of a protostar into a star is when there is too much material being fed into the protostar. Is enough mass increases into the
As you may already know, there is never a definite explanation on how the planets we see today were formed. There are a couple of theories that explain how it may have come about. 2 theories that are known about are Core accretion and the disk instability method. The core accretion explains the terrestrial planets better rather than giant planets like Uranus. An estimated 4 billion years ago the solar system was a cloud of dust and gas which we know as the
Scientists believe the solar system began about 5 billion years ago, perhaps when a nearby star exploded and caused a large cloud of dust and gas to collapse in on itself. The hot, central part of the cloud became the sun, while some smaller pieces formed around it and became the planets. Other fragments became asteroids and comets,
Our complex of stars, planets, and all other celestial structures collaborate to run the quintessential system that we live in, which has been our home for millions of years, the solar system. Yet, we commonly ignore the thought, why does our solar system, hence the word system, join effort with all structures to create the exemplary world we know today? To figure out the answer to this question, it is essential to understand and appreciate our solar system. The world is exactly how we humans desire, convenient for us to simply state that the Earth is close enough to the sun that we receive ample heat, yet not too far that we do not freeze. The solar system is a working system of countless stars, several planets and moons, and an abundance of comets and space phenomena.
To start off, our Sun is the most important part of our solar system. It is the biggest object and does have about 98% of the whole mass of the solar system. About 1.3 billion earths would fit inside the sun. The sun travels around the galaxy together with planets and other objects bound to it by gravitational forces. The largest of the bodies we call planets, most of which are in turn are orbited by smaller moons or satellites. These objects, together with many lesser masses, are known as the Solar system. The Sun is just a star, one of a hundred billion inhabiting our galaxy alone. Being a star the Sun is an example of the fundamental building blocks of our universe. It formed, 4.5 billion years ago, as the nucleus of a cloud of gas which was collapsing under its own gravitational attraction. At its formation, hydrogen was the most abundant gas, as elsewhere in the universe, and accounted for three quarters of the Sun’s original material. This will changes as the hydrogen is burned, and within the very central regions virtually all the hydrogen has been converted to helium. The outer regions have not yet taken part