because those stars have high luminosities.
Compared to most stars, it's actually a medium-sized star, and because of its yellowish-orange colour, means that the sun is haflway through it's live and is at its brightest. However, it's pretty bright, and would score a 6.5/10 compared to other stars.
because it closer to earth than other stars so it appears larger
Other than the Sun and Moon, the brightest thing in the evening sky right now is the planet Venus, visible in the southwest sky at sunset. In fact, Venus is so bright, you can see it in the daytime if you know just where to look. Other than Venus, the brightest stars in the sky are Sirius, Vega and Rigel.
Sirius is visible because it is a large, bright star, and is closer to Earth than other (actually brighter) stars.
No; the "magnitude" is how bright the star is. It can either mean:* The apparent magnitude = how bright it seems to us, * The absolute magnitude = how bright the star really is (i.e., how bright it would seem at a standard distance).
Compared to most stars, it's actually a medium-sized star, and because of its yellowish-orange colour, means that the sun is haflway through it's live and is at its brightest. However, it's pretty bright, and would score a 6.5/10 compared to other stars.
Second brightest after Venus?
No. The sun is very close to us so it seems very bright. There are a lot of stars that are much brighter than it, but are very far away. It is the same with the other stars. There are some very bright ones that are very far away and some dimmer ones that are closer to us. After the sun, the next brightest star is Proxima Centauri. The brightest star in the night sky that we see is Sirius, which is close, but much further away than Proxima Centauri.
quasars.
No. The sun is a star, not a planet. It is by no means the brightest star either. It only appears so bright because it is much closer to us than any other star.
It doesn't. A lot of stars seem larger and brighter than it. In fact, Polaris is the 49th-brightest star in the sky. To us, it is not a particularly bright star. It is important because it seems to be still as other stars rotate around it.
Europa is bright in relation to the other of Jupiter's moons due to it having an ice surface, ice is a reasonably good reflector compared to other materials meaning more light is reflected back to the earth, making it brighter than the other, dark surfaced moons.
because it closer to earth than other stars so it appears larger
Other than the Sun and Moon, the brightest thing in the evening sky right now is the planet Venus, visible in the southwest sky at sunset. In fact, Venus is so bright, you can see it in the daytime if you know just where to look. Other than Venus, the brightest stars in the sky are Sirius, Vega and Rigel.
Sirius is visible because it is a large, bright star, and is closer to Earth than other (actually brighter) stars.
Venus is called the morning star.
The sun is so close that it is too bright compared to the others.