The Origin of the Solar System l The Big Bang - The Nine Planets Here is a brief outline of the current theory of the events in the early history of the solar system: A cloud of interstellar gas and or dust (the “solar nebula”) is disturbed and collapses under its own gravity The disturbance could be, for example, the shock wave from a nearby supernova As the cloud collapses, it heats up and compresses in the center It heats enough for the dust to
Where Did the Big Bang Occur? | Space Questions The Big Bang event is a theory that exists in physics which describes a possible version of our universe expanding from an initial state of high density and temperature
Where is the Center of the Universe? | Space Questions The Outward Expansion of the Universe Key to the idea of the Big Bang is an understanding that the universe is gradually expanding It was in 1912 that observations by Vesto M Slipher indicated the so-called redshifting of the light from remote galaxies This observation led to the theory that the galaxies may be receding further away from the
The Universe | Facts, Information, History Definition The Big Bang theory states that the early universe was a hot place that expanded, and began to cool down This means that the universe should be filled with radiation which is actually the relic leftovers of the Big Bang event
Why Are Galaxies Flat? | Space Questions - The Nine Planets The Big Bang Process It Starts with Cosmic Inflation The theory suggests that at one point all the matter in the universe was held together in an area of infinite density and temperature This was prior to the Bing Bang which in truth was more of an inflation outwards
How Big is the Universe? | Size, Why So Big, Infinite Facts This theory is named the Big Freeze Another popular scenario suggests that our Universe will stop expanding, and will actually reverse this process When this happens, the Universe will re-collapse, and it will possibly lead to a reformation that will start with another Big Bang This scenario is called the Big Crunch
How Old is the Universe? | How They Know, Age History It is theorized to have formed shortly after the Big Bang Astronomers calculate the age of the Universe by analyzing the distances and radial velocities of other galaxies The cosmic microwave background is also factored into this, as it is a relic of the radiation leftover from the Big Bang
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