John Tebbutt

(1834–1916)
John Tebbutt was born in Windsor in New South Wales. He grew up on his father's property where he enjoyed astronomy (studying the stars and other objects in the sky). He began recording their positions and movements when he was 19 and built an observatory to study them. Because he passed on his knowledge to others, he helped to build up information about astronomy.

He became a famous Australian astronomer and was later the president of the Astronomical Society in Sydney. In 1861, Tebbutt discovered a comet which was named after him. Twenty years later he found another comet. He wrote more than 350 articles about astronomy in scientific magazines.

His face appears on the $100 note and an observatory near Sydney is named after him.