Want this question answered?
What lies beyond the boundary of the observable universe can not be known.
Sundogs are sun halos - there are loads of similar effects caused by the same processes, known collectively as atmospheric optics.The sun halos you have probably seen are like huge circular rainbows around the sun, or perhaps an arc directly overhead. The former is called a 22-degrees halo, and the latter a circumzenithal arc - but there are many more halos that can form.Check out www.atoptics.co.uk for a more comprehensive guide to these, along with great explanations and pictures from around the world.Sundogs, also known as parhelia, are just one of these effects, caused by light passing through ice crystals in clouds (or at ground level) and being refracted to split up the colours - just like light going through a prism. The collective glints of millions of crystals bending the sunlight combine to make all these fascinating and beautiful phenomena, which can be seen from anywhere in the world at least part of the year.
A:Some say that God createde the universe. Some say that Brahma created the universe. And so on. This must always remain a matter of dispute, without necessary animosity, since none of these claims can ever be proven. In each case, they are based on faith alone. There are even more explanations as to why one of these gods created the universe as there are creator gods. Scientists say the universe was created by the 'Big Bang', the single cosmic event that created matter out of nothing. This is still a hypothesis and therefore, like the religious explanations is also unproven. Its advantage, if any, is that it is consistent with known science and does not require the complication of a creator god, whose existence must then be explained.
Scientist believe the galaxies known as irregular galaxies are the result of several different outcomes, for instance the merger of a pair of galaxies, or a wondering galaxy that strays to close to a neighboring galaxy. There are many different explanations for why irregular galaxies occur.
We as humans currently do not know for sure what the exact size of the universe is due to technological limitations, and the universe is likely infinite in space. However, we do know how far we can see into the universe. From our vantage point on Earth, we can observe objects up to about 46 billion light years away, proving that the universe is in fact quite large! As mentioned above we do not know really how big the Universe is. However, in recent years, using methods not even conceived of until recently, it is fairly certain that the time since the Big Bang which is the beginning of the Universe as we know it is very close to 13.7 billion years. This has come from the WMAP satellite which measured the Microwave Background Radiation which is the remnant of the original energy release from that incredible explosive beginning of the Universe. Now that would normally mean that the Universe should not be more then 13.7 billion light years in any direction. This seems to be what we are seeing when we look out into the very limits of the Universe using our best telescopes in space and on the ground. There is a possibility that the Universe could be much bigger then that as the Big Bang theory requires a brief period of "Inflation" were the expanding space of the Universe had to travel much faster then the speed of light briefly in order to make all the observed consequences of the Big Bang theory come to pass. This could expand the whole Universe well beyond the limits of the time involved. So far this has not proven to be the case. Yet space can expand faster then the speed of light. Remember travel in space is managed by the "Higgs Field" which limits travel to the speed of light. Whereas space itself can expand faster then the speed of light as there is no restriction in how fast space itself can expand, it just requires an enormous amount of energy which was available for only a short time immediately after the Big Bang occurred. That means within quintillionth's of a second.
observable ? i'd say quarks.
Explanations must be Consistent. The explanation for one set of phenomena cannot contradict the explanation for other sets of phenomena. If explanations are inconsistent, they must be rectified or abandoned. Explanations must be Testable. Explanations must be examined in laboratories, in nature, in the field or through the study of past events and must be capable of shown to be incorrect. If they are incorrect they must be changed or abandoned. Preferred Explanations should be Elegant (Simple). Explanations that require the invention of the fewest "missing pieces" have the greatest reliability. Explanations cannot include pieces that are either inconsistent with what is already known or that are untestable.
Explanations must be Consistent. The explanation for one set of phenomena cannot contradict the explanation for other sets of phenomena. If explanations are inconsistent, they must be rectified or abandoned. Explanations must be Testable. Explanations must be examined in laboratories, in nature, in the field or through the study of past events and must be capable of shown to be incorrect. If they are incorrect they must be changed or abandoned. Preferred Explanations should be Elegant (Simple). Explanations that require the invention of the fewest "missing pieces" have the greatest reliability. Explanations cannot include pieces that are either inconsistent with what is already known or that are untestable.
A phenomenon is a fact or situation that is observed to exist or happen, especially one whose cause or explanation is in question. It is often used to describe something remarkable or unusual that is observed or experienced. Examples include natural occurrences like rainbows or auroras, as well as societal phenomena like trends or fads.
Behavioral evidence.
A visually observable trait is known as a Phenotype.
a star cataloque
What lies beyond the boundary of the observable universe can not be known.
There are an estimated 1011 (100 billion) galaxies in the observable Universe. It is not known how much bigger the Universe is, compared to the observable part.
Merriam-Webster is a highly trusted and reliable dictionary brand known for its up-to-date definitions, clear explanations, and comprehensive coverage of the English language.
It's because its structure and behavior are not directly observable.
The observable Universe has a diameter estimated at 93 billion light-years.