How was the Earth Created?
******** Today s question was asked by student Devin Felton School: Chenango Valley High School Teacher: Michael Breed Interests/hobbies: Going to movies, hanging out with friends Career Aspirations: Psychologist ******** Answer: Most scientists these days subscribe to the nebula hypothesis for the origin of our solar system, including planet Earth. The nebula hypothesis was originally proposed by the German philosopher Immanuel Kant in 1755, but it has evolved considerably recently as a result of data collected using spacecraft and modern telescopes. Although the nebula hypothesis is based on numerous careful observations made by many scientists, it remains a hypothesis because we do not know for sure: we were not around to see the Earth forming. The nebula was a diffuse, roughly spherical, slowly rotating cloud of gas and dust. The gases were mostly hydrogen and helium, two elements that make up most of the Sun, and the dust was chemically similar to material that makes up the Earth.
The Earth was created 4.54 billion years ago when part of the Sun’s accretion disc agglomerated into a spherical body. At that time, shortly after the birth of the Sun itself, the solar system’s matter was much more scattered around, in the form of asteroids and dust rather than planets. This “matter cloud” has been called a Bok globule, and these globules have been observed in other parts of the Galaxy. Scientists have determined the age of the Earth relatively precisely using isotope dating of the world’s oldest rocks. It is not known precisely what mechanism caused the precursor of the solar system, a gaseous nebulae, to form into the Sun and its attendant accretion disc. It may have been shockwaves from a nearby supernova, or simple gravitational collapse due to a threshold density. Whatever the cause, when enough density gathered in the center of the gas cloud, it ignited to become the Sun.
The Earth was formed 4.6 billion years ago from the same nebula cloud of gas and dust that the Sun and the eight other planets were formed. However, Earth then was very different from Earth now, and it would have been impossible for life to exist on it. In fact, it is only quite recently in the Earth’s 4,600,000,000 year long life that life, resembling modern-day life, has been possible, first with the dinosaurs over 200,000,000 years ago and now with humans and other animals. The Earth is still being formed now. It still has a molten centre which causes volcanoes to ocassionally erupt, and plates on the surface are constantly “swimming” meaning that they collide with other plates and cause earthquakes. Earth is still developing. Volcanoes still erupt, the earth still shakes, weather still forms landscapes. Creatures evolve. Some die out, some develop. The creatures that die out do so because they are not suitable for the planet’s current conditions.
The earth, as well as all the planets, comets, asteroids in the solar system and the Sun were formed in the same nebula or a cloud of atoms. The Orion Nebula which can be seen now just under Orion’s Belt is a nebula that is now forming new stars and around some of these stars planets. 4.5 billion years ago our solar system was formed when this cloud of elements condensed to form not only the sun but probably many other stars with planets.
after the big bang, a lot of space junk crashed together forming everything in the universe… included our solar system… and luckily earth formed to the size to gain an atmosphere and perfect temperature for life to form, evolve, and thrive… LuvsHugs is a liar, a big liar, and nothing but a liar there is evidence of big bang, god was made up…
