Quasars

No. Life cannot exist anywhere near a quasar. For one thing there is no "on" a quasar. A quasar consists of a disk of extremely hot matter falling into a supermassive black hole. What cannot cross the event horizon is ejected in jets at the poles at nearly the speed of light. The radiation of even a moderate quasar is more than 10 trillion times that of the sun. Even light years away any planet would be completely sterilized.

well actually all galaxies are active, and yes they do combine after a dance across the sky, and the center of the galaxies combine, I wouldn't call it eating though because all they do is combine with each other.

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The Andromeda galaxy is approaching our Galaxy at about 300 Km/s, and the collision between both galaxies will take place in about 4.5 billion years.

Andromeda galaxy is larger in both astronomical size and number of stars than the Milky Way, although Andromeda may not be the most massive, as recent findings suggest that the Milky Way may contain more Dark Matter, and so could be most massive than Andromeda (galaxy Messier 31 or National General Catalog 224).

Who will «eat» who?

Bets are accepted...

quasistellar object Technically, I shall tell you a better answer than the other one!At the very edge of the visible Universe scientists can see extremely bright and powerful objects called quasars. Quasars are about the size of our Solar System and produce more light and energy than 1000 galaxies. Think how incredible that is. A small object, not any bigger than our Solar System making so much power and light that it shines brighter than 1000 galaxies. Why are there no quasars near the Earth? The most distant objects visible in the Universe When we look at quasars which are 10-15 billion light years away, we are looking 10-15 billion years into the past. The quasars near Earth have died down long ago. What could produce so much Power and light? Quasars are probably super giant black holes, which are devouring entire stars. These black holes lie at the center of galaxies, and glow brightly as matter funnels into them.

The time it takes to observe a dramatic change in a quasar can vary significantly, depending on the nature of the change and the distance of the quasar from Earth. Generally, quasars can exhibit noticeable variations in brightness over timescales of days to weeks due to changes in their accretion disks or relativistic jets. However, for more substantial or permanent changes, such as shifts in spectral lines or overall luminosity, it could take many years to decades. Observations over extended periods are often needed to confirm such changes, given the vast distances involved.

Quasars are the unusual type of active galaxy in the universe.

Light and radio waves.