For us, it looks brighter than any star, but this is because it is much nearer. Now (March/April 2012) you can see two bright "stars" in the west, after sunset - the brighter one is planet Venus, the second-brightest one is planet Jupiter.
In terms of absolute brightness, a star is brighter than a planet.
Venus is occasionally brighter than jupiter
Venus is the brightest, then Jupiter and mars. All of these can potentially be brighter than sirus, but have to be well placed in their orbits relative to us.
Jupiter is not a star. It is a planet. However, there are stars that are smaller than the planet Jupiter.
Venus, at its brightest, is brighter than any other planet. However, when it's not at its brightest, there are a couple of others than can be brighter if they're near their brightest, Mars and Jupiter being the most notable.
Jupiter is the largest planet in our solar system, but not the largest planet of all. Planets larger than Jupiter have been found orbiting other stars.
Jupiter is the biggest planet in the solar system. However there have been 'super Jupiters' found orbiting other stars.
No. Jupiter is the largest planet in our solar system (the sun is a star, not a planet), but not the largest in existence. Planets larger than Jupiter have been found orbiting stars other than the sun.
The Milky Way galaxy has the most stars, with an estimated 100 billion stars. There is no planet that has more stars than any other since planets are celestial bodies that orbit stars.
There is a planet larger than Jupiter
No, Jupiter is not a brown dwarf. Jupiter is the largest planet in our solar system and is classified as a gas giant. Brown dwarfs are substellar objects that are larger than planets but smaller than stars, and they do not have enough mass to sustain nuclear fusion in their cores like stars do.
Observed from Earth there are no brighter stars at the night sky. If you see something that is brighter, it will be a planet.
Quasars A+