Approximately how many galaxies in the universe?

Question

How many solar systems in a galaxy? And how many planets in a solar system? And how many black holes in a galaxy?

Answer 1

it is impossible to know how many solar systems there are in a galaxy simply because no one has gone out there and counted them. Regardless, from what we can tell, most stars have a solar system. Solar systems appear to vary vastly, so it is truly impossible to know what the average number of planets are in solar systems. But lets just say that we're looking for interesting solar systems, with an Earth-like planet. Lets say, one Earth-like planet for every million solar systems. There are about 100 billion stars in our Galaxy, and assuming everyone has a solar system, that leaves approximately 1,000,000 Earth-like planets in our solar system.

As far as number of Galaxies in the universe, it's hard to say. The universe is, after all, (to put it mildly) rather big. But as far as we can tell, there are about 100 billion galaxies in our universe. Assuming the Milky way to be average (as there are galaxies that are bigger or smaller than ours) we can assume there are roughly 100 Million Billion Earth-like planets. That's 100,000,000,000,000,000 Earths out there waiting for us to be colonized. That oughta hold us over for a while.

As far as black holes go... we have no way of knowing. A black hole is not so much a thing as it is a literal hole in the fabric of reality. And because they are black, it makes them rather hard to look for. But observation seems to indicate that every galaxy has a supermassive black hole at its core. Ergo, there are at least 1 black hole per galaxy. But don't feel cheated, that one black hole is one monster of a black hole.

Answer 2

The number of galaxies can be roughly estimated.
This is done by an assumption that the average galaxy contains the same mass as the milky way.
The mass of the Milky way is in the order of 10^41 kilograms.
The Mass calculated of the Universe is aprox. in the order of 10^53 kilograms.
So the average number of galaxies =mass of Universe /mass per galaxy.
10^53 divided by 10^41= one trillion galaxies. This is only a rough estimate, there could be even a greater number.
NO one has ever observed or counted a Sun planet solar system in the Universe.It appear that our solar system is basically Unique.
Perhaps what is called black hole may be nothing but the substance of space in a very condensed form,if such a structure can actually exist and still maintain a spherical chemical formation of mass.This is still very doubtfull and the existance of black holes as postulated has not been conclusively proven. In other words there is a doubt in the world of science that blackhole really exist except in the caves of the earth.

Answer 3

There are estimated to be many billions of galaxies; too many to count. There are estimated to be 100 billion stars in our galaxy; too many to count. Other galaxies can be smaller, and a few are bigger, but our galaxy is one of the larger ones. We think there are black holes in the cores of most galaxies, and in some other places too, but that is such a new area of study that there is no estimated total number. Out solar system has 8 planets. Some other stars are now known to have a planet or even several, but we know next to nothing about solar systems other than our own.

Answer 4

the fear-unfastened estimate is around a hundred billion. notwithstanding, one night I observed a application on television the place an astrophysicist from Princeton (and previous severe college pal) used the Hubble telescope to learn the darkest region of area. His estimate replaced into approximately 3 hundred billion galaxies in the seen universe. an significant ingredient to bear in mind is that the extensive type in the seen universe is likewise going on because of the fact the universe improve hastens. This acceleration is via the dark potential. It ability that ultimately, no different galaxies would be seen because of the fact they are going to be so a procedures away that the sunshine won't in any respect attain us.

Answer 5

Estimates range from 200- to 400-billion. How many solar systems, black holes, etc., each galaxy contains is anyone's guess.

Answer 6

Your inquiry is definitely in the minds of many scientists who are trying to obtain a good estimate for the number of galaxies in the universe. The methods used to achieve such number varies, and therefore, the results would vary, too. Also, as new and improved technology becomes available, astronomers can detect fainter objects that were not seen before. These objects that have come into view will in turn change the estimated number of galaxies.
For example, in 1999 the Hubble Space Telescope estimated that there were 125 billion galaxies in the universe, and recently with the new camera HST has observed 3,000 visible galaxies, which is twice as much as they observed before with the old camera. We're emphasizing "visible" because observations with radio telescopes, infrared cameras, x-ray cameras, etc. would detect other galaxies that are not detected by Hubble. As observations keep on going and astronomers explore more of our universe, the number of galaxies detected will increase. For more about the Hubble Space Telescope

Answer 7

An infinite number of galaxies.
Anywhere from 100,000,000,000 to 100,000,000,000,000 solar systems (stars) per galaxy.
Any where from 1 to 40 or 50 planets per system.
At least one supermassive one in the center of each galaxy, with the possibility of smaller ones, lots of them, in every galaxy.

Answer 8

There are more galaxies in space than grains of sand on all the beaches in the world.

Answer 9

easy to remember:
10^11 galaxies/universe
10^11 stars/galaxy

Answer 10

Simple! Elementary dude. Too many to count! Billions trillions!!!!!!! enough said