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What else can I help you with?
Why is a black hole considered an oddity in the universe?
Considering the other oddity's in the Universe; Neutron stars, pulsars, Wolf Rayet stars, magnetar or even hypernovas, I don't think black holes are that odd.
What theory is expansion and contraction is repeated after billion of years?
You are thinking of the Big Bang Theory, where the universe has been expanding for about 14 Billion years. Some scientists think that the universe will continue to expand indefinitely. Others think that the universe will reach a point where the expansion will reverse to a contraction, which would ultimately result into a reversal of the whole Big Bang process. Here is a link that will explain more details: http://en.wikipedia.org/wiki/Big_Bang_theory
Will an observer falling into a black hole be able to witness all future events in the universe outside the black hole?
I don't think so. Such an observer will be utterly destroyed quite soon.
About many years ago do scientists think the universe first started to form?
Scientists estimate that the universe began forming around 13.8 billion years ago during an event known as the Big Bang. This marks the beginning of the expansion of space and the creation of all matter and energy in the universe.
Is the universe is expanding because of gravity?
In a closed universe, the expansion will eventually halt and contraction due to the pull of gravity. Check out the 'Electric Universe Model'. It should provide more detailed explanations. Beware! It's a deep subject and one can get lost/confused. Take it slow to groc in fullness. (BTW The Closed Universe Model mostly proven false or highly unlikely.) It is understandable that you are having trouble understanding the closed universe theory since as has already been previously mentioned it is most likely not true. What I think most people struggle to grasp is why the universe can at present be expanding but then this sudden change occur where this expansion is not only halted but reversed. This kind of question rivals questions like why did the Big Bang happen. The truth is we don't really know why this might happen, but it was established as a possible answer since if it were true, we could then explain the Big Bang. It was a solution designed to dodge a question. See link for further information
What is black energy attracted to?
I don't think there is such a thing as black energy. If you mean dark energy - well, it is proposed as a mechanism that explains the acceleration in the expansion of the Universe, but not much is really known about it.
A third theory that says the universe expansion will slow to equilibrium with the final destiny will be neither an endless expansion nor collapse could be called an universe?
Steady state universe. Like they used to think it was.
How does the big bang theory explain the expansion of your universe?
It doesn't really explain it as describe it. Think of the universe as sort of the smoke and debris that resulted from a massive explosion.
In what part is a black hole in the universe?
Astronomers believe that black holes exist in the center of every universe. They even think that there may be a black hole in the center of our galaxy, the Milky Way
Does this universe exist within a black hole?
Most scientists don't think so. The reason the question isn't patently ludicrous is that a) physics doesn't really say much about what's inside the event horizon of a black hole, and b) the radius of the event horizon scales directly with mass for black holes. So the larger a black hole is, the lower its average density is. Galactic-mass black holes can have surprisingly low densities (again: on average; at the singularity, density is infinite). It turns out that if you plug a reasonable guess for the mass of the observable universe into the equation for the Schwarzhild radius of a black hole, you get a radius of ... approximately the radius of the observable universe. Within a couple of orders of magnitude, anyway (and in cosmology, that's considered pretty close). So it's not as silly a question as it might appear at first. However, the reason we don't think the universe is inside a black hole is that a) the universe is expanding, which is hard to reconcile with it being inside a black hole, and b) it doesn't look like the universe has enough mass to halt the expansion (in fact, the expansion appears to be accelerating). There are a few, however, who do think it's possible. For some reason adding related links is not working, but do a Google search for "national geographic universe black hole" and you should find a recent (Feb 2014) article about it.
Is black holes exits in our universe?
scientists think that they do. there is one in every galaxy. also in ours
Why is a black hole considered an oddity in the universe?
Considering the other oddity's in the Universe; Neutron stars, pulsars, Wolf Rayet stars, magnetar or even hypernovas, I don't think black holes are that odd.
Who explained how the universe began and what black holes are?
I think that it was Stephen hawking NO it was your mum
What theory is expansion and contraction is repeated after billion of years?
You are thinking of the Big Bang Theory, where the universe has been expanding for about 14 Billion years. Some scientists think that the universe will continue to expand indefinitely. Others think that the universe will reach a point where the expansion will reverse to a contraction, which would ultimately result into a reversal of the whole Big Bang process. Here is a link that will explain more details: http://en.wikipedia.org/wiki/Big_Bang_theory
Why do scientist think the universe will expand forever?
There is actually considerable debate about that. Some scientists believe that the universe (or at least, the part we can see!) is not massive enough to cause the current expansion to slow down and reverse, and other scientists believe that "dark matter" may provide enough mass to reverse the expansion.From a philosophical viewpoint, the idea of an "oscillating" universe - big bang followed by expansion, followed by contraction, followed by collapse, and repeat forever - is more appealing. But at present, the balance of the evidence seems to be against it.There is evidence that the expansion of the Universe has been accelerating. It is not known exactly why, and it is possible that the expansion may slow down again, but this doesn't seem very likely.
What made Hubble think the universe was expanding?
Hubble observed that galaxies were moving away from each other, indicating that the universe is expanding. He discovered a relationship between a galaxy's distance from Earth and its velocity, known as Hubble's law, providing evidence for this expansion.
What are some reasons why the study of the universe can be made difficult?
You can think of the universe as a black box. Meaning we don't understand it clearly, but the question is why. First the universe is huge. There are tons of stars and lots of galaxies. So since the universe is so big it's harder to explore.
