Chiron is a small celestial body orbiting between Saturn and Uranus. Discovered in 1977, it's classified as a "minor planet" or "planetoid," and in astrology represents our deepest wound and our greatest healing gift.
In mythology, Chiron was a centaur wounded by a poisoned arrow. Being immortal, he couldn't die but couldn't heal himself - so he devoted his life to healing others.
In your chart, Chiron's placement shows where you've been wounded and where you can help others heal. It takes about 50 years to orbit the Sun, so most people experience a "Chiron Return" around age 50.