Obviously stars are all made from matter...so this question could be addressed as; how do forming stars obtain more matter. The answer is simply more gravity. Gravity is defined as the attraction force between two masses. So as the star attracts more matter its gravity increases and this process of attracting matter speeds up.
But the only way gravity can increase is if there is plenty of matter available. Matter isn't spread out uniformly across the universe often its clustered in vast 'pockets' of gasses and particles called 'Nebula's', these are where stars are born. If a star is forming inside a particular large nebular it has more matter available therefore the stars gravity can continue to grow and create a larger star than a star in a nebular with less matter.
This isn't the only reason how star size varies but is the easiest to explain. Its also easier to understand as our sun was created inside the same nebular as other local stars which is why we don't find particularly larger stars close to earth; which is probably a good thing.
some stars are smaller than sun remaining stars are bigger than sun.
Our sun is about average compared to other stars. Some are much smaller (white dwarfs) and others are much larger.
Their are some other stars bigger than the sun
This is either because the star in question is actually bigger than other stars, or became it is closer to the observer (Earth) than other stars.
Because some are larger than others and some are closer than others.
The Sun is bigger than some stars and smaller than others. It is brighter than some stars and dimmer than others. Relative to the Earth it is much closer than all other stars.
Our Sun is a star, stars are suns. Some stars are bigger than our Sun, others are smaller.
Some stars are larger than the sun.
some stars are smaller than sun remaining stars are bigger than sun.
The sun is bigger than some stars but smaller than others. It is more important to us than other stars because it is the only one close enough to provides us with a substantial amount of energy.
Some stars are actually bigger than others, and some are closer to us, so appear bigger. The biggest star is UY Scuti, which is 1708 times bigger than the sun. It is 7800 light years away. The closest is Alpha Centauri, at 4.5 light years away. Note: nearly all stars are so far away that they still appear as just points of light, even in large telescopes. The angular size of some stars can be measured using "interferometry".
Our sun is about average compared to other stars. Some are much smaller (white dwarfs) and others are much larger.
Their are some other stars bigger than the sun
Some Girls Are Bigger Than Others was created in 1986-06.
ARE* the stars bigger than mars? To answer your question: Yes, much bigger. Since the Sun in our solar system is in itself a star and is much bigger than Mars, you can assume that all stars are bigger Mars. P.S. The Sun is considered a relatively small star compared to others in our Galaxy.
This is either because the star in question is actually bigger than other stars, or became it is closer to the observer (Earth) than other stars.
Because some are larger than others and some are closer than others.