Hans-Emil Lau (16 April 1879 – 16 October 1918) was a Danish astronomer. He started his observational career during his studies at Copenhagen University. After completing his degree in 1906 he worked at the Urania, the at Berlin, and finally at in Copenhagen. He is most famous for his work on Mars and Jupiter. He also worked on star parallax, the measuring of variable stars, the color of stars, and the observation of comets, sunspots, and the rings of Saturn. He published speculative orbits of two trans-Neptunian planets in 1900, which were never found.
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| - Hans Emil Lau (ca)
- Hans Emil Lau (de)
- Hans E. Lau (en)
- 汉斯·劳 (zh)
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| - Hans Emil Lau (* 16. April 1879 in Odense; † 16. Oktober 1918 in Kopenhagen) war ein dänischer Astronom. Er begann seine Beobachtungskarriere während seines Studiums an der Universität Kopenhagen. Nach seinem Abschluss im Jahr 1906 arbeitete er an der Urania-Sternwarte in Kopenhagen, 1911/12 war er Assistent am Treptower Observatorium in Berlin und schließlich am Horsholm Observatorium in Kopenhagen. (de)
- 汉斯-艾米尔·劳（Hans-Emil Lau，1879年4月16日－1918年10月16日），丹麦天文学家。 劳在丹麦的哥本哈根大学学习期间就开始了天文观测。1906年毕业后，他在柏林的特雷普陀观测台工作，后又到哥本哈根的赫斯霍尔姆天文台。 劳的主要学术贡献在于他对火星和木星的研究。另外，他的研究范围还包括星团、变星的测量、星球的颜色、彗星、太陽黑子以及土星的卫星的观测。 他于1900年发表了从未被发现的超海王星天体的轨道预测报告。在火星上的一个陨石坑是以他的名字命名的。 1918年因西班牙流感而身故。 (zh)
- Hans Emil Lau (Odense, 16 d'abril de 1879 – Copenhaguen, 16 d'octubre de 1918) va ser un astrònom danès. Va començar la seva carrera a la universitat de Copenhaguen. Després de completar la seva llicenciatura el 1096 va treballar a l'observatori Treptow de Berlín i finalment a l'observatori Hørsholm, a prop de Copenhaguen. És famós pels seus estudis sobre Mart i Júpiter. També va treballar en altres àrees com el paral·laxi de les estrelles, mesuraments d'estrelles variables, el color de les estrelles, i l'observació de cometes, taques solars, i els anells de Saturn. (ca)
- Hans-Emil Lau (16 April 1879 – 16 October 1918) was a Danish astronomer. He started his observational career during his studies at Copenhagen University. After completing his degree in 1906 he worked at the Urania, the at Berlin, and finally at in Copenhagen. He is most famous for his work on Mars and Jupiter. He also worked on star parallax, the measuring of variable stars, the color of stars, and the observation of comets, sunspots, and the rings of Saturn. He published speculative orbits of two trans-Neptunian planets in 1900, which were never found. (en)
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| - Hans Emil Lau (Odense, 16 d'abril de 1879 – Copenhaguen, 16 d'octubre de 1918) va ser un astrònom danès. Va començar la seva carrera a la universitat de Copenhaguen. Després de completar la seva llicenciatura el 1096 va treballar a l'observatori Treptow de Berlín i finalment a l'observatori Hørsholm, a prop de Copenhaguen. És famós pels seus estudis sobre Mart i Júpiter. També va treballar en altres àrees com el paral·laxi de les estrelles, mesuraments d'estrelles variables, el color de les estrelles, i l'observació de cometes, taques solars, i els anells de Saturn. Va participar en la primera cerca de planetes transneptunians organitzada a l'observatori de Harvard per William Henry Pickering. Després d'observar l'òrbita d'Urà del 1690 i 1895, va concloure que un sol planeta transneptunià no podia justificar totes les discrepàncies a l'òrbita, i va postular la posició dels dos planetes que creia que n'eren responsables. Pickering va estar d'acord a buscar aquests hipotètics planetes, però no es van poder trobar. Va morir prematurament durant l'epidèmia de grip de 1918. Es va anomenar un cràter d'impacte de Mart en honor seu. (ca)
- Hans Emil Lau (* 16. April 1879 in Odense; † 16. Oktober 1918 in Kopenhagen) war ein dänischer Astronom. Er begann seine Beobachtungskarriere während seines Studiums an der Universität Kopenhagen. Nach seinem Abschluss im Jahr 1906 arbeitete er an der Urania-Sternwarte in Kopenhagen, 1911/12 war er Assistent am Treptower Observatorium in Berlin und schließlich am Horsholm Observatorium in Kopenhagen. (de)
- Hans-Emil Lau (16 April 1879 – 16 October 1918) was a Danish astronomer. He started his observational career during his studies at Copenhagen University. After completing his degree in 1906 he worked at the Urania, the at Berlin, and finally at in Copenhagen. He is most famous for his work on Mars and Jupiter. He also worked on star parallax, the measuring of variable stars, the color of stars, and the observation of comets, sunspots, and the rings of Saturn. He published speculative orbits of two trans-Neptunian planets in 1900, which were never found. He died prematurely at the age of 39 during the worldwide 1918 flu pandemic. A crater on Mars was named in his honor. (en)
- 汉斯-艾米尔·劳（Hans-Emil Lau，1879年4月16日－1918年10月16日），丹麦天文学家。 劳在丹麦的哥本哈根大学学习期间就开始了天文观测。1906年毕业后，他在柏林的特雷普陀观测台工作，后又到哥本哈根的赫斯霍尔姆天文台。 劳的主要学术贡献在于他对火星和木星的研究。另外，他的研究范围还包括星团、变星的测量、星球的颜色、彗星、太陽黑子以及土星的卫星的观测。 他于1900年发表了从未被发现的超海王星天体的轨道预测报告。在火星上的一个陨石坑是以他的名字命名的。 1918年因西班牙流感而身故。 (zh)
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