that's because some stars are closer to the earth; another reason is that some stars get more sunlight than others; another reason IS that the star might not have that much enregy
Some stars make more nuclear fusion, or just have more energy.
a teliscope
It is the closest star to us and that is why it looks bigger and brighter.
Simple, even though the sun is dimmer then many stars, it is over a thousand times closer to the earth and thus is larger to us and brighter
Those stars are too far away for us to see them individually, but their combined light makes part of the night sky look brighter.
Some stars make more nuclear fusion, or just have more energy.
a teliscope
How big, how hot (color/amount of energy emitted), how far, light pollution at viewing site
moon is too nearer to earth than stars
It is the closest star to us and that is why it looks bigger and brighter.
Look up in the sky and you will see. Polaris is actually quite dim, compared to other stars and planets. Even at it's dimmest, Mars is brighter than Polaris.
Simple, even though the sun is dimmer then many stars, it is over a thousand times closer to the earth and thus is larger to us and brighter
No, The earth does not have stars. Stars are like the sun. They are so far away that they do not look bright to us. Look at car headlights. When a car is far away, its headlights seem dim. They get brighter as the car gets closer.
because the sizes and the distances away from earth are different
"Luminous" in this context means "bright" - how much light (or how much energy in general) does the star emit. Note that stars look dim to us only because they are far away - some of them are actually several times brighter than our Sun, in absolute terms. That is, if you would see several stars, and our Sun, at a same standard distance, some stars would be dimmer, but others would be brighter, than our Sun.
Because the stars emit light. The closer they are, the brighter. Also planets reflect the light off of the stars, so they also look like stars.
When there is little light like during night time, we can see the stars more clearly. This makes them look brighter and hence, larger.