Quasars

Quasars, short for "quasi-stellar objects," are extremely luminous and distant celestial objects powered by supermassive black holes at the centers of galaxies. They emit vast amounts of energy, outshining entire galaxies and appearing star-like in optical telescopes, hence their name. Quasars are among the brightest and most energetic phenomena in the universe, often found in the early stages of galactic evolution. The light from quasars can take billions of years to reach Earth, providing critical insights into the structure and formation of the universe. Their study helps scientists understand the behavior of matter in extreme gravitational fields and contributes to our knowledge of the cosmological expansion and the history of galaxies.