1. 1. The Beginning Of It All — 13.5 Billion Years
  2. 2. Components Of The Universe — Dark Matter and Dark Energy
  3. 3. Size Of The Universe — Infinite or Finite
  4. 4. More Then One — Multiverse Idea
  5. 5. Ever Growing
  6. 6. Video Gallery

Whether a creationist or an evolutionist, all will agree that the universe and everything in it had a beginning somewhere, somehow. What exactly is the universe? Everything around us. The stars, moons, planets, galaxies, and so much more. The word universe is used whenever describing a single whole of any "place" as a means of description. For instance, our oceans and all that is in them have been described on many occasions as an aquatic universe. But where did the universe come from and how big is it? In truth, we don't know, but there have been theories and speculations based on data that has come about from explorations over the past 56 years.

The Beginning Of It All

Artist's impression of the Big BangArtist's impression of the Big Bang /

The Big Bang theory is the most widely accepted in the scientific community as an explanation of the existence of our universe. All evidence points to this theory and astronomers have continued to seek out new data to either confirm or discount this idea. First introduced in 1927 by Georges Lemaitre, the basic idea was that the universe started as a single hot point in space estimated at about 13.5 billion years in the past.

A large explosion created an expanding effect sending out matter and particles all across the expanse forming our universe and everything in it. Although this seems so simple an explanation for such a complex existence, that is the consensus in the scientific community as all evidence collected to date points to this idea.

Components Of The Universe

Image of a galaxy cluster, invisible dark matter represented in blueImage of a galaxy cluster, invisible dark matter represented in blue /

The universe is comprised primarily of dark energy (unknown form of energy explained by the universe's accelerated expanding rate), dark matter (hypothetical type of matter that makes up 27% of the mass and energy in the "seen" universe), and ordinary matter (everything that can be physically seen, measure, and/or touched). Other aspects of the universe include electromagnetic radiation (visible light is an example of this) and antimatter (particles that have the opposite charge as ordinary matter would have).

Scientist have yet to prove the existence of dark energy or dark matter, but there has been strong evidence that suggest it exist. One key evidence is the fact that the stars are moving around at a faster rate than they should be based on the calculations involving "seen" matter, such as the gravity of another star or planet. This concludes there has to be a type of matter that is creating this effect that is "unseen", aka dark matter. Scientist, in fact, have achieved the creation of dark matter, but that does not prove that it exist as we created it rather than it existing on its own.

Size Of The Universe

Visualization of the whole observable universeVisualization of the whole observable universe /

Is the Universe finite (has a beginning and an end) or infinite (continuous with no end)? No one knows. The universe does have horizons (a boundary between the seen and unseen) so there may be objects whose lights are so distant from our viewpoint that we are unaware of their existence, so the true size of the universe is yet to be known. All that is known is from the furthermost objects we have been capable of detecting, is that our universe is approximately 91 billion light years (the length of distance light travels in a single year) in size.

There is no edge or middle that we are capable of detecting at this time, but there seems to be an endlessness to space, almost like a loop. Some even have made mention that like a planet, the universe may actually be spherical or as another theory has suggested it is flat and continues on infinitely.

Multiverse Idea

Artist's impression of MultiverseArtist's impression of Multiverse /

Is there more than one universe? Several pieces of evidence have pointed to a strong possibility that there are multiple universes but at this time they have no real proof of it. There are several theories surrounding this idea from the universe is flat and stretches to infinity from one universe to another, to the universe is round like a planet and multiple universes hover around one another similar to a solar system. Whatever the case may be we currently do not have the technology to fully prove or disprove any theories on this concept at this time.

This concept has also spurred on two additional theories such as parallel universes and the possibility of an alternate dimension that we are incapable of viewing. These universes exist in correlation (or side by side) with our own universe but are unable to be detected as they remain in a realm outside our 4 dimensional one, space-time being the 4th dimension.

Ever Growing

The expansion of the UniverseThe expansion of the Universe /

Our universe has yet to stop expanding. Data shows that solar systems and galaxies are moving further apart from one another which proves that the universe is not done growing. There are many speculations as to what this continued expansion could mean, but all agree: one day it will be unable to expand any further. Think of the universe as a rubber band. You can only stretch it so far before one of two things occur. Either the rubber band breaks or it will become so tight that it will pull back. Whichever event occurs, that rubber band will attempt to return to its original state which will cause a major catastrophic event that will destroy everything within. Then it will either start over or become something else entirely. Again, there is no evidence as to what will happen and this is all based on speculation.

The universe is a vast mysterious expanse that may take billions of years before we can even graze the surface of understanding. With the multitude of possibilities and exceptions, we gain more questions with every answer we obtain. Perhaps an understanding of the universe is beyond our human capability, or perhaps we are just not ready for the answers that we seek. Either way, we as a species will forever look ahead with only one quest in mind, as the famous words from the science fiction television show Star Trek stated: "to explore strange new worlds, to seek out new life and new civilizations, to boldly go where no man has gone before".

See also: Milky Way