Quasars are among the brightest objects in the universe and are intrinsically far, far brighter than stars, though the one which appears brightest to us on Earth (3C 273, a quasar in the constellation of Virgo) is so far away (about two and a half billion light years) that it cannot be seen without a telescope.
3C 273 is actually two trillion times as bright as the Sun and is in fact about a hundred times brighter than the entire Milky Way galaxy.
We do think that quasars involve super massive black holes, but what we see is not the black hole itself (which is, well, black and therefore invisible) but its accretion disc.
Quasars A+
While the sun is the brightest object in our solar system, there are stars much brighter than the sun, such as Sirius and Canopus. Also, certain astronomical events like supernovae or quasars can briefly outshine even the brightest stars.
quasars.
Supernovae are often brighter than stars; they can get bright enough to be seen during the day, although these are quite rare. The Sun, the Moon, and some planets, comets and meteors are also brighter than stars.
Double stars, or a Super Nova, or a comet that is close to Earth the Moon and of course Venus. The morning, evening "Star". Actually you have to distinguish between apparent brightness (as seen from Earth) and absolute brightness (as seen from a standard distance). In apparent brightness, Venus, Jupiter and Mars are brighter than any star - but their real brightness is much less. In absolute terms, some things that are brighter than single stars are groups of stars (double stars, star clusters, galaxies, galaxy clusters), exploding stars (novae, supernovae, hypernovae); and quasars.
Because they are closer or actually brighter.
It is better to say that the sun appears brighter because it is closer. Some stars are actually brighter than the sun.
Because it is nearer that the stars.
'Appear' would become 'appeared' in the past tense so the sentence would simply be 'some stars appeared to be brighter than others'.
moon is too nearer to earth than stars
Nubula does not exist.
Yes, a average quasar is the size of our solar system