Ivan Yarkovsky
[Image:Yarkovsky.jpg|thumb|Ivan Yarkovsky]
Ivan Osipovich Yarkovsky was a Polish-Russian civil engineer. Born to a Polish family in Asveya, he worked for a Russian railway company and was obscure in his own time. Beginning in the 1970s, long after Yarkovsky's death, his work on the effects of thermal radiation on small objects in the Solar System was developed into the Yarkovsky effect and the YORP effect, thanks to his rediscovery by Estonian astronomer Ernst J. Öpik. The asteroid 35334 Yarkovsky is named in his honour. In 1888, he also created a mechanical explanation of gravitation.