There are tens of thousands of galaxies and our galaxy, The Milky Way, is just one of them. Galaxies have many shapes and sizes; however, they have the commonality of gravity, stars, gases, dust, dark matter, and remnants of planets and stars that have exploded.
Actually, the significant portion of galaxies are elliptical and are believed to have massive black holes right in the center. The universe contains all of space, including the many galaxies, planets, stars, and all other forms of energy or mater. The universe is such a vast expanse that it is a breathtaking collection of space and time, filled with everything you could imagine and some things you could not.
The theory of the creation of the universe is an enigma in that there are so many theories, including scientific, and religious and not just one religion. There are many religions that have their idea of the formation of the universe.
There are a lot of cosmologists that are saying that the universe is still continuing to expand as time passes by. The galaxy is said to be expanding faster than light. Some say that this is inevitable and that it is meant to occur.
The universe will keep on expanding and will keep on getting larger until such time when there will be no space to expand anymore. When this occurs, the big freeze will occur. This will signify the end of the universe. The expansion of the universe just proves that there are other solar systems and galaxies that are available different from our own galaxy. No one knows when the galaxy will stop expanding.
Some of the sicintsts believe that there is multiverse but they dont have evidience that its true and its completely fine if you dont believe but if there is multiverse alot of things are going to change in our phisics.
Multiverse is infinitenumber of parallel universes and universes.
The exact shape of the universe is still a matter of debate among scientists. The shape can be described by the critical density.
If the density of the universe is more than the critical density, then the universe is closed and curved like a sphere.
If the density of the universe is less than the critical density, then the shape of the universe is curved like a saddle but if the density of the universe is equal to the critical density, then the universe is shaped like a flat piece of paper.
There are some people who wish that they would be able to reach the edge of the universe but they are not sure how they are going to do it. Some have speculations that when you reach the edge of the universe, you might reach another universe and live there.
The question is, is there some sort of technology that will make this possible? There is no rocket that will be able to travel space and the whole universe in a short amount of time. Most planets would take years before they can be reached. Some of the areas of the universe cannot be reached by people in their lifetime.
Celestial bodies, also known as heavenly bodies are natural bodies that exist outside the earth's atmosphere. Examples of celestial bodies are: Sun, Moon, Stars, Asteroids, Kuiper belt, Comets, Galaxies, other planets and Meteorite.
They form parts of the vast universe. There are billions of celestial bodies in the universe. Celestial bodies are far awat from us and we cannot see all of them with our naked eye.
According to the definition given by International Astronomical Union (IAU), a light year is the distance that light travels in a vacuum. A light year is a unit used to express and measure astronomical distances.
According to IAU, light year is the product of Julian year (365.25 days) and the speed of light (299792458 m/s).
1 light year = 9460730472580800 metres.
Many astromers contributed to the discovery of celestial bodies. Celestial bodies were not discovered at the same time or by the same people. Galileo Galilei diiscoved details of the bodies of the solar systems, Christiaan Huygens discovered the Saturn moon called Titan.
Franz Saver Von Zach, Edmond Halley, Giuseppe Pizzi, Giovanni Domenico Cassini and many others contributed and discovered different parts of the celestial bodies.