Yes, there are limits for stars - limits to lower and upper mass, longevity, size, etc. Given the mass of the universe a limit for the number of extant stars would also exist. During stellar collapse at end of a star's life there are some well-studied limits answering to degeneracy pressure, like the Chandresekhar limit, the Oppenheimer-Volkoff limit, etc., which prevent further collapse until a certain mass limit is exceeded (perhaps the last limit being quark degeneracy pressure before further collapse into a black hole).
For further examination of a given limit, the limit in question would need to be identified.
Chandrashekhar limit
There is an upper limit to the mass of neutron stars because if the mass exceeds a certain value, known as the Tolman–Oppenheimer–Volkoff limit, the gravitational force would overcome the pressure from neutron degeneracy and cause the star to collapse further into a black hole. This limit is estimated to be around 2-3 times the mass of the Sun.
There is an upper limit to the mass of neutron stars because if the neutron star is too massive, neutrons would be crushed by the gravity of the neutron star, and the neutron star would collapse into a black hole.
Stars are powered by nucliar fussion. There is minimum pressure and temperature requirement in order to start the process. So to became Star the object has to have enought mass to increase its internal temperature and pressure.
Constellations are just regions in the sky - a general direction, so to speak. In any direction there are millions of stars. So, depending which stars you count, that is, up to what brightness limit you want to include stars, you will get more stars, or less stars.
Chandrashekhar limit
Get the rest of the stars there are 15 more.
There is an upper limit to the mass of neutron stars because if the mass exceeds a certain value, known as the Tolman–Oppenheimer–Volkoff limit, the gravitational force would overcome the pressure from neutron degeneracy and cause the star to collapse further into a black hole. This limit is estimated to be around 2-3 times the mass of the Sun.
There is an upper limit to the mass of neutron stars because if the neutron star is too massive, neutrons would be crushed by the gravity of the neutron star, and the neutron star would collapse into a black hole.
Stars are powered by nucliar fussion. There is minimum pressure and temperature requirement in order to start the process. So to became Star the object has to have enought mass to increase its internal temperature and pressure.
The upper mass limit for main-sequence stars is around 100 solar masses because the intense radiation and stellar winds in massive stars lead to mass loss through stellar winds and prevent the star from accreting enough material to exceed this limit. Additionally, stars with masses above 100 solar masses would generate such strong radiation pressure that it would overcome the force of gravity, preventing the formation of stable stars with higher masses.
the sky has no limit. that's the point.yes
Well, friend, neutron stars are truly marvelous. On their cosmic canvas, the lower limit for their mass is about 1.4 times the mass of our sun. That's a comforting thought to know these celestial wonders come in a variety of sizes.
While there is no strict limit to the mass of a star at its birth, the range typically falls between 0.1 to 150 times the mass of our Sun. Stars more massive than this upper limit would have such strong gravitational forces that they would not be able to maintain stable fusion reactions and would likely end up as black holes or neutron stars.
In all probability - not that this scenario would happen - but the resulting combination of masses, would push the combined "stars" over the Chandrasekhar limit and a black hole would form.
When they run out of thermonuclear fuel in their cores. What fuel this would be varies, as more massive stars can fuse heavier elements. The absolute upper limit is iron, as fusing it absorbs energy.
Under ideal conditions, the limit is about 6m. That's how the "m" was originally defined - 1m for the brightest stars, 6m for the faintest that could be seen with the naked eye. (However, with the modern definition, the brightest stars have an apparent magnitude of less than 1m - even negative magnitudes.)