[1] In 2002, Sasselov led a team that discovered the most distant planet in the Milky Way known at the time.
He developed a liking for astronomy at an early age and would observe the moons of Jupiter by means of a small telescope.
[3] In the 1980s, Sasselov continued his study of astronomy at the Sofia University's Faculty of Physics.
After he published a paper in international scientific journals, he was invited by the University of Toronto, who offered him a scholarship.
He acquired a doctorate in physics from Sofia University in 1988;[1][4] shortly thereafter, with the collapse of the Soviet Union and the communist regimes in Eastern Europe, Sasselov had the chance to eventually continue his work at the University of Toronto.