There are on the order of 100,000,000,000 (one hundred billion) galaxies in the universe, as far as current telescopes can detect. Some of these galaxies may hold up to 100,000,000,000 stars, but most galaxies probably contain at least 10,000,000,000 stars. Young galaxies under 2,000,000,000 years old may not have formed many solar systems yet, while very old galaxies more than 10,000,000,000 years old may have very few galaxies left. For the galaxies of middle age, as many as 1/4 of the stars may possess solar systems.
My comment: While the answer above is true based upon current knowledge, it is essentially incorrect.
The answer to your question is: ONE. Our Sun is named Sol - and the system of planets and other objects orbiting it are referred is referred to as "Solar", being of Sol. So other planetary systems exist, but they are not "Solar"...
Comment: The above is incorrect, the answer above is for our known universe not the entire universe. There may be even more. The universe doesn't have a known edge, or a wall so, it's really hard to say.
It would be possible to even say infinite, though scientists really hate the word infinite ;)
There are on average about 100 billion stars in each galaxy, and 100 billion galaxies in the known Universe, so that means that there are 10,000 billion billion stars in the known Universe (or 10^22 in scientific notation - that's 10000000000000000000000!!) Even if only one in ten of those stars have planets - which is far too low an estimate - there would still be 10^21, or 1000 billion billion solar systems in the known Universe alone - and there are probably an infinite number beyond the boundaries of what we can see!
There are no constellations in the solar system as the stars that make up the constellations are outside of our solar system.
Only one planet is out of the solar system that is Pluto .
There are 5 rocky planets in our solar system if you count Pluto. If not, there are 4 rocky planets in the solar system.
there are nine planets in the solar system if we add Pluto.
The sun is the centre of our solar system. The sun, planets and many other items make up our solar system.
There are thousands and thousands of other planets outside of our solar system, along with many other galaxies, universes, and planetoids, and possibly other forms of life.
other planets, other stars, other solar systems, other galaxy's, the rest of the universe, possibly more universes
The Universe is bigger. The Universe encompasses everything we know; it isn't known whether there are other universes.
There are no constellations in our solar system. All constellations you see are outside our solar system.
There are 4 syllables in solar system.
zero. There is no constellation in solar system
There are nine planets in the solar system
There are no constellations in the solar system as the stars that make up the constellations are outside of our solar system.
Our solar system has 1, Other solar systems are unexplored at the moment....
There are no star patterns in the solar system. There is only one star in the solar system ... the sun.
Yes, the solar system is the only one in our solar system. there are other solar systems many trillions of miles away. You can see their suns, these are the stars.
they can look beyond our planet and into our solar system some like the hubble telescope can take pictures of universes and send pics back to earth pics= pictures