Bohdan Paczyński (1940-2007) - astronomer, in the 1970s a world leader in the theory of the evolution of stars. However, he became famous for a new method of discovering cosmic objects and measuring their mass by the lenticular gravitation. He was living permanently in the USA since 1981. He was a professor at Princeton University. received a great number of awards and titles, e.g. Henry Norris Russell Lectureship (2006), and the Commander's Cross of the Order of Polonia Restituta (posthumously in 2007). The planetoid 11755 Paczynski was named after him.
