Publications
2020
Professional publications
Davis, J., Degenaar, B., de Ruiter, A., van Gent, R. H., Pappot, A., & Agostino, A. (2020). A Previously Unrecorded Medieval Latin Astrolabe and Evidence for a Mid-fourteenth Century Instrument Workshop. Bulletin of the Scientific Instrument Society, 146, 6-23. https://webspace.science.uu.nl/~gent0113/publications/zuylenburgh_astrolabe.pdf
2018
Scholarly publications
van Gent, R. H. (2018). A Mysterious Cosmographical Map attributed to Nicolaes van Geelkercken. A Note on Historical Celestial Maps, Facsimiles and Fakes. Acta Historica Astronomiae, 64, 341-350. http://adsabs.harvard.edu/abs/2018AcHA...64..341V
2016
Scholarly publications
Neuhäuser, R., Kunitzsch, P., Mugrauer, M., Luge, D., & van Gent, R. H. (2016). Tycho Brahe, Abū Ma‘shar, and the Comet beyond Venus (Ninth Century A.D.). Journal for the History of Astronomy, 47(2), 136-158. https://doi.org/10.1177/0003702816645734
van Gent, R. H. (2016). Eclipses in Antiquity: Using Astronomy for Dating. Ancient History Magazine, 1(4), 55-57.
2014
Scholarly publications
van Gent, R. H. (2014). Kalenderpenning. In J. R. ter Molen (Ed.), Fries goud en zilver: De geschiedenis van de Friese edelsmeedkunst in woord en beeld (pp. 932-933). Bornmeer.
van Gent, R. H. (2014). Sufi, Abd al-Rahman al-. In I. Kalin, S. Ayduz, & C. Dali (Eds.), The Oxford Encyclopedia of Philosophy, Science, and Technology in Islam (Vol. 2, pp. 286-288). (Oxford Encyclopedias of Islamic Studies). Oxford University Press, USA.
2013
Scholarly publications
Zuidervaart, H. J., & van Gent, R. H. (2013). Between Rhetoric and Reality: Instrumental Practices at the Astronomical Observatory of the Amsterdam Society 'Felix Meritis', 1786-1889. Uitgeverij Verloren.
van Gent, R. H. (2013). No Evidence for an Early Seventeenth-Century Indian Sighting of Kepler's Supernova (SN1604). Astronomische Nachrichten, 334(3), 300-306. https://doi.org/10.1002/asna.201211721
2012
Scholarly publications
Verbunt, F., & van Gent, R. H. (2012). The Star Catalogues of Ptolemaios and Ulugh Beg: Machine-Readable Versions and Comparison with the Modern HIPPARCOS Catalogue. Astronomy and Astrophysics, 544, [31]. https://doi.org/10.1051/0004-6361/201219596
Popularising publications
van Gent, R. H. (2012). For the Record. Sky and telescope, 124(4), 9. [4].
2011
Scholarly publications
Verbunt, F., & van Gent, R. H. (2011). Early Star Catalogues of the Southern Sky: De Houtman, Kepler (Second and Third Classes), and Halley. Astronomy and Astrophysics, 530, A93/1-A93/26. [93]. https://doi.org/10.1051/0004-6361/201116795
2010
Scholarly publications
Verbunt, F., & van Gent, R. H. (2010). Three Editions of the Star Catalogue of Tycho Brahe: Machine-Readable Versions and Comparison with the Modern Hipparcos Catalogue. Astronomy and Astrophysics, 516, [28]. https://doi.org/10.1051/0004-6361/201014002
Verbunt, F., & van Gent, R. H. (2010). The Star Catalogue of Hevelius: Machine-Readable Version and Comparison with the Modern Hipparcos Catalogue. Astronomy and Astrophysics, 516, [29]. https://doi.org/10.1051/0004-6361/201014003
2009
Scholarly publications
van Gent, R. H., & van Egmond, M. (2009). Vier eeuwen hemelcartografie: Oude sterrenkaarten en -prenten nu op internet beschikbaar. Zenit, 36, 269-273.
Popularising publications
van Gent, R. H. (2009). Vier eeuwen de hemel geobserveerd en in kaart gebracht: Utrechtse collecties oude sterrenkundige drukken. In M. van Egmond, B. Jaski, & H. Mulder (Eds.), Bijzonder onderzoek: Een ontdekkingsreis door de Bijzondere Collecties van de Universiteitsbibliotheek Utrecht (pp. 162-167). Universiteitsbibliotheek Utrecht. http://www.staff.science.uu.nl/~gent0113/publications/bijzonder_onderzoek_22.pdf
2008
Scholarly publications
van Gent, R. H. (2008). De zon verduisterd over Europa. Geo-Info, 5, 110-111.
2007
Scholarly publications
van Gent, R. H., & van Helden, A. (2007). Lunar, Solar, and Planetary Representations to 1650. In D. A. Woodward (Ed.), The History of Cartography: Volume Three. Cartography in the European Renaissance (pp. 123-134). University of Chicago Press.
2006
Scholarly publications
van Gent, R. H. (2006). Over antipoden, amfiskieten, heteroskieten en periskieten. Geo-Info, 3, 538-539.
van Gent, R. H. (2006). Het sterrenlied in het Hollandse zeevaartonderwijs: Berijmde instructies voor het vinden van de sterrenbeelden en het uur van de nacht. Gewina, 28, 208-221.
Professional publications
van Gent, R. H. (2006). Andreas Cellarius. Harmonia Macrocosmica of 1660: The Finest Atlas of the Heavens / Der prächtigste Himmelsatlas / L'atlas céleste le plus admirable. Taschen.
2005
Scholarly publications
van Gent, R. H. (2005). Observations of the 1761 and 1769 Transits of Venus from Batavia (Dutch East Indies). In D. W. Kurtz (Ed.), Transits of Venus: New Views of the Solar System and Galaxy. Proceedings of the 196th Colloquium of the International Astronomical Union held in Preston, Lancashire, United Kingdom, 7-11 June 2004 (pp. 67-73). (IAU Symposium and Colloquium Proceedings Series; Vol. 196). Cambridge Universtiy Press.
van Gent, R. H. (2005). Mapping the Lunar Shadow: The Earliest Solar Eclipse Maps. In A. D. Wittmann, G. Wolfschmidt, & H. W. Duerbeck (Eds.), Development of Solar Research / Entwicklung der Sonnenforschung: Proceedings of the Colloquium Freiburg (Breisgau), September 15, 2003 (pp. 103-127). (Acta Historica Astronomiae; Vol. 25). Verlag Harri Deutsch.
Popularising publications
van Gent, R. H. (2005). Cartography Credit. Sky and telescope, 109(5), 12. http://adsabs.harvard.edu/abs/2005S&T...109e..12V
2004
Scholarly publications
Zuidervaart, H. J., & van Gent, R. (2004). "A Bare Outpost of Learned European Culture on the Edge of the Jungles of Java": Johan Maurits Mohr (1716-1775) and the Emergence of Instrumental and Institutional Science in Dutch Colonial Indonesia. Isis, 95(1), 1-33.
Popularising publications
van Gent, R. H. (2004). Assigning Quadrants. Sky and telescope, 107(4), 14.
2003
Scholarly publications
van Gent, R. H. (2003). The Telescope and its Introduction in Japan. In Headwaters of Science and Technology in Pre-Modern Japan - Galileo, Leeuwenhoek, Ikkansai: 3rd International Symposium on Edo no Monozukuri, Nagahama Royal Hotel, November 7-10, 2003 (pp. 1-4). Yoshida Printing Co..
2002
Scholarly publications
van Gent, R. (2002). The Astronomical and Astrological Content of the Prints. In H. F. J. Horstmanshoff, A. M. Luyendijk-Elshout, & F. G. Schlesinger (Eds.), The Four Seasons of Human Life: Four Anonymous Engravings from the Trent Collection (pp. 65-77 & 91-94). (Nieuwe Nederlandse Bijdragen tot de Geschiedenis der Geneeskunde en de Natuurwetenschappen (NNBGGN); No. 60), (Pantaleon Reeks; No. 32). Erasmus Publishers/Trent Collection Duke University.
2001
Scholarly publications
Ackermann, S., & van Gent, R. H. (2001). La Meridiana di Sant'Agostino in Urbino / The Meridian Line of Sant'Agostino in Urbina. In F. Vetrano (Ed.), La Scienza del Ducato di Urbino / The Science of the Dukedom of Urbino (pp. 141-174). Accademia Raffaello.
2000
Professional publications
van Gent, R. H. (2000). De hemelatlas van Andreas Cellarius: Het meesterwerk van een vergeten Hollandse kosmograaf. Caert-thresoor, 19(1), 9-25.
Popularising publications
van Gent, R. H. (2000). Planetoïde nr. 1: Ceres. In Sterrengids 2001 (2001 ed., pp. 121-123). Stichting 'De Koepel'.
1999
Scholarly publications
van Helden, A. C., & van Gent, R. H. (1999). The Lens Production by Christiaan and Constantijn Huygens. Annals of Science, 56(1), 69-79.
Popularising publications
van Gent, R. H., & van der Zalm, E. B. J. (1999). De dageraad van het nieuwe millennium. Zenit, 26(12), 508-512.
van Gent, R. H. (1999). Gelap! De Nederlandse zonsverduisteringsexpedities 1901-1973. Zenit, 26(7/8), 319-323.
1998
Scholarly publications
van Gent, R. H., & van der Spek, T. (1998). Groeten uit de kosmos. Buitenaards gevaar: feit of fictie? (Mededeling Museum Boerhaave; No. 276). Museum Boerhaave.
1996
Popularising publications
van Gent, R. H. (1996). Het raadsel van de Ster van Bethlehem: Oude en nieuwe sterrenkundige verklaringen. Zenit, 23(12), 510-514.
van Gent, R. H. (1996). Nogmaals: De fresco's van Qusayr `Amra. Zenit, 23(11), 478.
van Gent, R. H. (1996). Sirius en de Dogon. Skepter, 9(2), 15-20.
1995
Scholarly publications
van Gent, R. H., & van Helden, A. C. (1995). De Huygenscollectie. (Mededeling Museum Boerhaave; No. 262). Museum Boerhaave.
van Gent, R. H., & van Helden, A. C. (1995). Een vernuftig geleerde: De technische vondsten van Christiaan Huygens. (Mededelingen Museum Boerhaave; No. 263). Museum Boerhaave.
van Helden, A. C., & van Gent, R. H. (1995). The Huygens Collection. (Mededeling Museum Boerhaave; No. 264). Museum Boerhaave.
Popularising publications
van Gent, R. H. (1995). Van hemelkaarten en hemelglobes: De platte en gewelfde afbeelding van de hemel. Zenit, 22(7/8), 342-346.
1994
Scholarly publications
van Gent, R. H. (1994). De hemel in de hand: Twee astrolaben van het Museum Boerhaave / The Portable Universe: Two Astrolabes of Museum Boerhaave. (Mededeling Museum Boerhaave; No. 259). Museum Boerhaave.
1993
Scholarly publications
van Gent, R. H. (1993). De reizende astronoom: Nederlandse sterrenkundige expedities naar de Oost en de West. (Mededeling Museum Boerhaave; No. 256). Museum Boerhaave.
van Gent, R. H. (1993). De nieuwe sterren van 1572, 1600 en 1604 op de hemelglobes van Willem Jansz Blaeu. Caert-thresoor, 12(2), 40-46.
Popularising publications
van Gent, R. H., Heukelom, W., Martens, R., Mulder, K., Terpstra, B., & Smit, R. (1993). Hoe waar is astrologie? (AO Reeks; No. 2448). Stichting IVIO.
van Gent, R. H. (1993). De Nederlandse Venusexpedities van 1874 en 1882. Zenit, 20, 332-337.
van Gent, R. H. (1993). Isaac Newton and Astrology: Witness for the Defence or the Prosecution. Correlation: Journal of Research into Astrology, 12(1), 33-37. http://www.staff.science.uu.nl/~gent0113/astrology/newton.htm
1992
Scholarly publications
van Gent, R. H., & Leopold, J. H. (1992). The Time-Keepers of Leiden Observatory. (Mededeling Museum Boerhaave; No. 256). Museum Boerhaave.
van Gent, R. H., & Leopold, J. H. (1992). De tijdmeters van de Leidse Sterrewacht. (Mededeling Museum Boerhaave; No. 255). Museum Boerhaave.
Popularising publications
van Gent, R. H. (1992). Ijdelheid en leegheid: Isaac Newton en de Astrologie. Skepter, 5(1), 24-25.
1991
Scholarly publications
Van Gent, R. H. (1991). Steady Shine. Nature, 349(6309), 470. http://www.nature.com/nature/journal/v349/n6309/abs/349470b0.html
Popularising publications
van Gent, R. H. (1991). Conjunctions of Yore. Sky and telescope, 82(3), 230. http://adsabs.harvard.edu/abs/1991S&T....82..230V
1990
Popularising publications
van Gent, R. H. (1990). Look-alike Comets. Sky and telescope, 79, 470.
1989
Scholarly publications
van Gent, R. H. (1989). Studies on Interacting Binaries. Krips Repro.
van Gent, R. H. (1989). Lightcurves of the Algol-variable U CrB in the UPS Photometric System. Astronomy and Astrophysics Supplement Series, 77(3), 471-485. http://adsabs.harvard.edu/abs/1989A&AS...77..471V
van Gent, R. H. (1989). A Photometric-Spectroscopic Analysis of the Algol-type Binary U CrB. Space Science Reviews, 50(1/2), 264-268. http://adsbit.harvard.edu//full/seri/SSRv./0050//0000264.000.html
Heintze, J. R. W., & van Gent, R. H. (1989). The Masses and Radii of the Components of U Cep. Space Science Reviews, 50(1/2), 261-263. http://adsabs.harvard.edu/abs/1989SSRv...50..261H
van Gent, R. H. (1989). The Colour of Sirius. The Observatory, 109(1), 23-24. http://adsabs.harvard.edu/abs/1989Obs...109...23V
van Gent, R. H. (1989). Evidence for Transient Colour Changes of Algol in the Past. Space Science Reviews, 50(1/2), 372. https://doi.org/10.1007/BF00215975
van Gent, R. H. (1989). Some Modifications to the Wilson-Devinney Program. Space Science Reviews, 50(1/2), 371. https://doi.org/10.1007/BF00215974
Popularising publications
Hulspas, M. G. M., & van Gent, R. H. (1989). Vuur en ijs: 2. Katastrofisme versus uniformisme. Skepter, 2(1), 33-37.
1988
Popularising publications
van Gent, R. H. (1988). Sirius, de Hondsster. In Sterrengids 1989 (1989 ed., pp. 141-144). Stichting 'De Koepel'.
Hulspas, M. G. M., & van Gent, R. H. (1988). Vuur en ijs: 1. De vele voorgangers van Velikovsky. Skepter, 1(4), 12-17.
1987
Scholarly publications
Van Gent, R. H. (1987). The Colour of Sirius in the Sixth Century. Nature, 325(6099), 87-89. http://adsabs.harvard.edu/abs/1987Natur.325...87M
1986
Scholarly publications
van Gent, R. H., & Lamers, H. J. G. L. M. (1986). Periodicity of the Radial-Velocity and Brightness Variations of the Hypergiant P Cygni (B1 Ia+) and the Origin of the Shell Ejections. Astronomy and Astrophysics, 158(1/2), 335-350. http://adsabs.harvard.edu/abs/1986A&A...158..335V
Popularising publications
van Gent, R. H. (1986). No Red Sirius. Sky and telescope, 72(6), 556-557. http://adsabs.harvard.edu/abs/1986S&T....72..556V
van Gent, R. H. (1986). Robeola was Arcturus: Sirius is nooit rood geweest. Zenit, 13(6), 212 & 418. http://adsabs.harvard.edu/abs/1986Zenit..13..212V
1984
Scholarly publications
1982
Scholarly publications
van Gent, R. H. (1982). Evidence for a Third Component in the U CrB System. Astronomy and Astrophysics Supplement Series, 48, 457-480. http://adsabs.harvard.edu/abs/1982A&AS...48..457V
van Gent, R. H. (1982). Johnson BVR Magnitudes for Selected Comparison Stars. Information Bulletin on Variable Stars, (2140). http://adsabs.harvard.edu/abs/1982IBVS.2140....1V
1981
Popularising publications
van Gent, R. H. (1981). [The Origin of the Julian Day Numbers]. Sky and telescope, 62(1), 16. http://adsabs.harvard.edu/abs/1981S&T....62...16V
1978
Scholarly publications
van Gent, R. H., Heintze, J. R. W., & Provoost, P. (1978). Photoelectric Minima of U CrB, u Her and U Oph. Information Bulletin on Variable Stars, (1507). http://adsabs.harvard.edu/abs/1978IBVS.1507....1V