What does the universe mean?

Answer 1

The universe is the whole structure of reality, observable or hypothetical. The universe consists of a hierarchy of structures or objects. Its main components are the galaxies which are large-scale structures of stars and interstellar gas and dust held together by gravitation. Quasars are extremely luminous and distant sources of radiation which are believed to be galaxies in their early stages of evolution. Stars are huge spheres of plasma (ionized gas) that generate energy by nuclear fusion in their cores and are bound together by gravity. The solar system is the region of space within the Sun's gravitational field. The Sun is the central star around which planets and other bodies orbit. Planets are large spheres of rock or hydrogen gas that orbit their parent stars. The earth is a large ball of land and liquid water third in distance from the Sun that is the only object in the universe known to support life. The natural satellite of Earth is the Moon which is a small rocky ball with no atmosphere that orbits the Earth in a period of one month. There are other moons that orbit the other planets. Asteroids are rocky debris left over from the formation of the solar system and comets are icy bodies which orbit the sun or some other star. The earth, together with its living organisms, including ourselves, is also part of the universe and in ancient times was considered to be all that existed. There are also planets which orbit other stars outside the solar system. The universe is composed of space, time, matter, and energy. Space is the continuous three-dimensional field extending in every direction in which all bodies are located and all events take place. The dimensions of space include length or distance, width or breadth, and depth or height. Time is the continuous transformation of existence in which events in the universe follow one after the other in an apparently forward direction from past through present to future. It is also a component by which we measure motions of bodies in space. Matter is what possesses mass, occupies specific positions in space, and exists in four fundamental states as a solid, liquid, gas, or plasma (ionized gas). The basic constituents of matter are atoms which are further divided into subatomic particles such as protons, neutrons, and electrons. Mass is a measure of inertia of a body or how much it resists acceleration or change of direction. Weight is a measure of the gravitational pull on a body. Energy is the capacity of a body or system to do work. Examples of energy include light, heat, and electricity. Work is a measure of displacement of a body by a force. It is simply the use of energy that is transferred from a body. The four fundamental forces are the strong and weak nuclear forces, electromagnetism, and gravitation. It has been established that all of space is expanding carrying the galaxies along with it. This means that the universe must have been much smaller, denser, and hotter in the past. Most scientists believe that the universe originated from an infinitely dense and hot point 13.7 billion years ago which began the expansion of space that we observe today. This is known as the big bang theory. A competing theory states that the universe has remained the same throughout all of time and had no beginning and space is constantly being filled with new matter. This is known as the steady-state theory and today is in disfavor by much of the scientific community in favor of the big bang which best describes the current spatial expansion and much of the microwave background radiation filling all of space. There are also components of the universe in which we can't observe directly but can only speculate on such as dark matter and dark energy. In many religious institutions, the universe is believed to be governed by spiritual beings over its components or to have been created by the command of an infinite and supreme being.

Answer 2

To answer this question I think it is easiest to simply describe our universe. It consists of roughly a hundred billion galaxies, and extends in all directions further than we can see. Our universe is expanding about 70km/s/Mpc (70 kilometers per second per mega parsec), but the rate of expansion is unexpectedly increasing.

Our universe (most likely) began about 13.7 billion years ago in an inflationary hot big bang. The cosmic background radiation, 3 degrees above absolute zero, would be the "echo" of that beginning.

If there are other universes, we have no knowledge of them at the present time, nor of anything that might have come before. Within the context of our universe, "before" may be meaningless--time would have begun with our universe.

Answer 3

The universe refers to all of space, time, matter, and energy that exists within it. It encompasses everything from the stars and planets to galaxies and black holes. Scientists believe the universe originated from a single point in a big bang event, leading to its expansion and the formation of all cosmic structures.

Answer 4

The universe consists of the milkyway galaxy, our 8 planets, other galaxies and worm holes.

Answer 5

well i discovered that theres an holy sun(blue) and theres is about 200,000,000 of universes surounding the holy sun, i called this glaxera (galaxy and univers together)

Answer 6

Universe is a Greek word which means uni-single, and verse-spokeken sentence. Universe is a single spoken sentence.

Answer 7

It means everything that is created.

Answer 8

All of the galaxies combined

Answer 9

Near as we can figure, mostly hydrogen.