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How long did Ptolemy's earth-centered theory remain popular for the structure of the universe?
Wiki User
∙ 12y ago
Aristarchus came up with the heliocentric model of the solar system about the same time that Aristotle developed the geocentric model. But since it was OBVIOUS that the Sun went around the Earth, the geocentric model prevailed for about 1800 years before Copernicus realized that the math worked better if the Sun was at the center.
Wiki User
∙ 15y ago
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What is cosmology?
Cosmology is the study of the Universe as a whole. While astronomy studies individual celestial objects such as stars, planets, and galaxies, cosmology focuses on the big picture: How the Universe works, how it came into being, and how it might end. It studies the structure of galaxies and the structure of space-time (warpage via black holes etc), the nature of time itself, mass and energy, string theory, and whether there are actually other Universes, in a 'neverending multiverse' or omniverse.Cosmology differs from Astronomy. Astronomy seems to concentrate on the naming of stars and the description of Earth's solar system. Cosmology concentrates more on the physiology of the Universe as it were.
Is a borderless universe a reality?
Because any border of the universe it not observable, the reality of it remains a theoretical pursuit; but generally, cosmologists agree that current data would tend to indicate the universe is infinite and "flat". One popular model (FLRW) posits that the universe is without boundaries. Research and mathematical models postulate both a bounded and unbounded universe, and some even purport that the universe might be bounded in some directions (or dimensions) but not in others; often models are speculative and hampered by inherent limits in experimental method. In particular, recent efforts have shown that we might not ever be able to distinguish between a flat, open or closed universe if the cosmological curvature parameter is sufficiently small.
Is it possible a super massive black hole sucked in everything then blew up to make the big bang?
No, because then all the mass of the Universe would have a starting point from which it came from. Contrary to popular representations of the early cosmos, that is NOT what happened. The BB was NOT an explosion of mass into empty space, it was an expansion of all space, at every point in our Universe away from every point in our Universe. If the BB were an explosion, the cosmic microwave background radiation would have a preferred direction it was coming from -- and it doesn't. Your idea is interesting, but it simply doesn't fit the observed facts of our Universe.
Does the big bang theory propose that all the matter and energy in the universe was once compressed into an extremely small volume?
Absolutely not. This is a common misconception, not helped by popular presentations and by statements that "the Universe" was once the size of a proton. The problem comes about partially due to the careless failure to distinguish between "the entire Universe" and "that part of the entire Universe that we can presently observe." Many people -- scientists included -- refer to both as simply "the Universe" without making clear that the latter is (at most) an infinitesmal subset of the former. The present observable Universe is a sphere of radius about 46 billion light years. THAT small fraction of the total Universe was, indeed, the size of a grapefruit at one time. How much larger the ENTIRE Universe was at that time is, at present, impossible to determine -- and may always remain unknowable. The entire Universe may be a "mere" 100,000 times large than the observable Universe, or infinitely large. The only guesstimate ever made was that our entire Universe must be no less than 10^23 times larger than the observable universe. Thus, what BB cosmology states is that our Universe was once un-imaginably denser than it is now. Also, please be aware that BB cosmology does NOT state that matter was compressed into a smaller volume. Our Universe is not becoming less dense because matter is spreading out through empty space. It is becoming less dense because SPACE ITSELF is expanding (not exploding) -- matter is simply coming along for the ride.
How Much Do Scientists Know about the Beginning of the Universe?
Scientists do not really know much at all about the beginning of the universe. A popular idea is the Big Bang Theory, and another is creationism. How much do you know the interiors of the earth. Have you seen it for yourself of whats written in the books. The theories can be challenged as technology evolves. The Big Bang theory does throw a light to the universe's creation and evolution but does fall short of some interesting problems. A new theory is emerging called hyperspace which again accounts for these problems and covers the other problems up as solved by Big Bang. Another is the W-Map which is the energy print of the universe in the light of microwaves, Radio waves, and some other waves of the electrostatic spectrum.It shows us of how the universe's energy has widened from the time of its birth. It actually is accounted by the amount of dark energy in the universe.
How long did Ptolemy's earth centered theory remain popular for the structure of the universe?
1,500 Years .
How long did ptolemy earth centered theory remain the popular theory for the structure of the universe?
1,500 years :D
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