They are called quasars. We occasionally observe short bursts of gamma radiation which outshine even quasars temporarily, but astronomers aren't absolutely certain yet what causes them.
Generally the brightest objects seen in the sky are the moon, some planets, (notably Venus and Jupiter) and stars, Sirius being the brightest.
universe
Yes, quasars are extremely luminous astronomical objects found in the distant universe. They are powered by supermassive black holes at the centers of galaxies, making them some of the brightest and most energetic sources in the cosmos.
Hypernovae are the brightest object in space while black holes are the darkest object in space.
As the question specifies brightness, the brightest star in the Universe is our Sun - because it is the closest star to us. The most luminous star is another question: See related question.
The brightest objects are hypernovae and the darkest objects are black holes.
Sei
That would include: Sun Mercury Venus Earth Mars and its moons Jupiter and its moons Saturn and its moons Neptune and its moons Uranus and its moons Pluto and other planetesimals and their moons Asteroids Comets
Generally the brightest objects seen in the sky are the moon, some planets, (notably Venus and Jupiter) and stars, Sirius being the brightest.
universe
Our sun is not the brightest star in the universe. It only appears brighter because it is much close than any other star. The brightest star as it appears in the sky is Sirius.
Gerontology. Astronomy is the study of celestial objects such as planets and stars, as well as the Universe as a whole.
Yes, quasars are extremely luminous astronomical objects found in the distant universe. They are powered by supermassive black holes at the centers of galaxies, making them some of the brightest and most energetic sources in the cosmos.
Alpha centuri is one of the brightest stars in the universe.
Brightness is related to luminousity and distance. On Earth, the brightest thing would be a nuclear explosion. In space, the brightest thing would be a supernova, but it all depends on the distance from it.
Hypernovae are the brightest object in space while black holes are the darkest object in space.
A black hole. Nothing gets out of it; but because of interactions with the matter around it, black holes can still be the brightest objects in the Universe! Do some reading on quasars, for more details.