Martin Hoek (also Martinus) (13 December 1834 in The Hague – 3 September 1873 in Utrecht[1]) was a Dutch astronomer and experimental physicist.

In 1857 he graduated with the Ph.D. dissertation work The comet of the years 1556, 1264 and 975, and its alleged identity.

Earlier, in 1856, Karl Ludwig von Littrow had discovered at the Vienna State Archives a pamphlet by Joachim Heller containing observations of the Great Comet of 1556 as well as a broadsheet by Paul Fabricius with a map of the comet's course.

[3][4] In 1859 he was associate professor of astronomy at the University of Utrecht and Director of the Royal Observatory Sonnenborgh.

In 1864 he became member of the Royal Netherlands Academy of Arts and Sciences.