episode #118 origin of Earth

he Universe is time, space, planets, stars, galaxies, etc. — in the form of either mass or energy. It consists of billions of galaxies; each galaxy consisting of billions of stars and their solar systems, and each solar system further consisting of many planets and their satellites. Just a simple sneak-peek into Wikipedia of the Milky Way says that “it is estimated to contain 100–400 billion stars and at least that number of planets.”  Our planet Earth is one of the eight planets of our solar system, which itself is part of the Milky Way Galaxy, which itself is part of the Universe. Just like the other inner planets—Mercury, Venus, and Mars—it is relatively small and rocky. Be it with the help of science, or philosophy, or religion, people have come up with many arguments regarding the origin of everything subject through the years. For most of our human history, people had assumed the Universe to be one infinity, the one that was always out there, encapsulating everything from the beginning.

A large number of hypotheses were put forth by different philosophers and scientists regarding the origin of the Earth. The same hypotheses and explanations that have been applied to the formation of the solar system apply to the origin of the earth.

  • Early theories explained how the earth was formed. The early theories were the Gaseous hypothesis of Kant, the Nebular Hypothesis of Laplace, the Planetesimal hypothesis of Chamberlin, Jean and Jeffery’s tidal theory/Gravitational Theory, Russel’s binary star hypothesis, Hoyle’s supernova hypothesis, and Schmidt’s interstellar hypothesis.
  • Modern Theory stated that need to find how the universe has formed then automatically we will be able to find the formation of earth. Early theories focused solely on the evolution of the earth and planets, whereas recent theories attempt to solve the questions of the universe’s creation. Big bang theory is an example of modern theory.

In the late 1920s the American astronomer Edwin Hubble made a very interesting and important discovery. Hubble made observations that he interpreted as showing that distant stars and galaxies are receding from Earth in every direction. Moreover, the velocities of recession increase in proportion with distance, a discovery that has been confirmed by numerous and repeated measurements since Hubble’s time. The implication of these findings is that the universe is expanding.

Hubble’s hypothesis of an expanding universe leads to certain deductions. One is that the universe was more condensed at a previous time. From this deduction came the suggestion that all the currently observed matter and energy in the universe were initially condensed in a very small and infinitely hot mass. A huge explosion, known as the Big Bang, then sent matter and energy expanding in all directions.







A community radio midnight show Through the Bohemian Looking Glass is aired Sunday, Tuesday and Friday night at midnight (GMT), that means you stay late on Saturday, Monday and Thursday. A new episode is aired every Sunday midnight (the night between Saturday and Sunday) on Wirral Wave radio or AirTime. Later on SoundCloud for some time.