Michał Hłuszniewicz (Russian: Михаил Осипович Глушневич, Lithuanian: Mykolas Hlusnevičius; 1797 – 21 July 1862) was an astronomer of the Russian Empire who was the sixth director of the Vilnius University Astronomical Observatory (1843–1848).
[1] After graduating from a gymnasium in Minsk, Hłuszniewicz studied mathematics at Vilnius University from 1814 to 1818.
[2][1] In 1819 he became an adjunct professor, and later assistant to Piotr Sławinski, the director of the Vilnius University Astronomical Observatory.
Hłuszniewicz participated in Carl Friedrich Tenner's triangulation of Lithuania and other surrounding areas[4] for which he was awarded the Order of Saint Stanislaus with a ring.
He also continued publishing the observatory's magazine (called Extrait des observations faites à l’observatoire de l’Académie Impériale des Sciences à Vilna), which was established during Sławinski's time.