Of course they aren't. At times, it may have seemed that certain objects in the Universe were older than the Universe, due to wrong estimates about (a) the age of the Universe, or (b) the age of the corresponding objects. But, as more exact calculations become available, these discrepancies are solved. The fact that some objects seemed to be older than the Universe was, precisely, an indication that something was wrong in the age calculations.
Quasars are brightly glowing powerful "engines" of the Universe. Usually they surround black holes and glow when material funnels in. According to Astronomer Maarten Schmidt there are 100 times less quasars now than 10 billion years ago.
The universe is older
The fact that most quasars are very distant means they were like that when the Universe was quite a bit younger than it is today.
Quasars are the unusual type of active galaxy in the universe.
The Universe - 2007 Pulsars and Quasars 4-10 was released on: USA: 27 October 2009
No. The universe is everything that exists.
Quasars are not gone; they are still observed in the universe. Quasars are powered by accretion of material onto supermassive black holes at the centers of galaxies, which can make them appear as some of the brightest and most powerful objects in the universe. However, the number of observed quasars may be influenced by factors such as the current stage of galaxy evolution or observational limitations.
Quasars emit more energy than anything else in the universe. Quasars are massive black holes at the cores of some galaxies, swallowing matter and stars and ejecting them out collimated bipolar jets of matter and radiation which stretch out hundreds of thousands of light years. Since there are quasars in galaxies close by, these indicate the evolution of our universe.
All quasars are located at a great distance from us. Of the quasars discovered, they range from between 780 million and 28 billion light years away. Because of these distances and the velocity of light, we are seeing them early on in the creation of the Universe. They are very rare they have only found about 20 or so. See related link for more information.
Yes, quasars are the most luminous objects in the universe.
Quasars typically have large redshifts, which indicate that they are moving away from us at high speeds. This redshift is due to the expansion of the universe and can help astronomers determine the distance and age of quasars.
There are about 12,000 known quasars today. I'm sure that as our telescopes get better, that number will go up. As a guess, I would estimate a lot.