Quasars

At the very end of the visible universe,extremely bright and power full objects called quasars can be seen.They are the most distant objects visible in the universe.Quasars are about the size of the solar system,but produce more light and energy 1000 galaxies.

What are quasars?
They are probably super giant black holes,which are devouring entire stars.These black  holes , believed to lie at the center of galaxies,glow brightly as matter funnels into them.
Quasars are important because they show us what the Universe was like,billions of years ago.

Two Quasars with their Host Galaxy

The light from quasars take billions of years to reach us.When we look at a quasar,we see what they looked like in the distant past.