What optical device is the Dutch scientist, after whom the lunar crater Jansen is named, credited for?
5ec000925ab76fdbd95502805d14ab9c
Jansen (crater) Jansen is a lunar crater in the north part of the Mare Tranquillitatis, named after Zacharias Janssen. It is located to the east-southeast of the crater Plinius. The rim of Jansen is low and narrow, with a notch along the western edge. The interior is relatively level, which may indicate it has been covered by lava. To the south-southwest a small but prominent crater lies on the crater floor, halfway between the center and the rim, further southeast is a small but prominent crater named Sinas.
686a799960b302c5fc3d6fd60e817509
Zacharias Janssen Zacharias Janssen (also Zacharias Jansen or Sacharias Jansen) (1585 – pre-1632) was a Dutch spectacle-maker from Middelburg associated with the invention of the first optical telescope. Janssen is sometimes also credited for inventing the first truly compound microscope. However, the origin of the microscope, just like the origin of the telescope, is a matter of debate.
a5229e6d7fb6fc7b7a646a4ad8f31529
Louis Émile Javal Louis Émile Javal (May 5, 1839 – January 20, 1907) was a French ophthalmologist born in Paris. Javal is remembered for his studies of physiological optics and his work involving a disorder known as strabismus.
1840a8c7e70aa94a6548ecb8feaef207
Nestor J. Zaluzec Nestor J. Zaluzec is an American scientist and inventor who works at Argonne National Laboratory. He invented and patented the Scanning Confocal Electron Microscope. and the π Steradian Transmission X-ray Detector for Electron-Optical Beam Lines and Microscopes.
11017918d7746f4d9d4ac3c0351bdc9c
John Jacob Bausch Johan (John) Jacob Bausch (July 25, 1830 – February 14, 1926) was an American maker of optical instruments who co-founded Bausch & Lomb (with Henry Lomb). Over six decades he transformed his small, local optical shop into a large-scale international enterprise, pioneering the American optical industry.
aa42fda9cd77dbe613740f3b664ea046
Selenography Selenography is the study of the surface and physical features of the Moon. Historically, the principal concern of selenographists was the mapping and naming of the lunar maria, craters, mountain ranges, and other various features. This task was largely finished when high resolution images of the near and far sides of the Moon were obtained by orbiting spacecraft during the early space era. Nevertheless, some regions of the Moon remain poorly imaged (especially near the poles) and the exact locations of many features (like crater depths) are uncertain by several kilometers. Today, selenography is considered to be a subdiscipline of selenology, which itself is most often referred to as simply "lunar science." The word selenography is derived from the Greek lunar deity Σελήνη "Selene" and γράφω graphō, "I write".
499b1b2c5f9ada8cd63d54005dcc6e42
John Carroll (astronomer) Sir John Anthony Carroll {'1': ", '2': ", '3': ", '4': "} (8 January 1899 – 2 May 1974) was a British astronomer and physicist. In the 1920s he worked at the Solar Physics Observatory, Cambridge, UK with F.J.M. Stratton and Richard van der Riet Woolley. He made major technological advances, inventing a high resolution spectrometer, and (with C G Fraser) a "coronal camera".
4aecc08fe4ec147ac7f22f7e82a25ec3
Heinrich Geißler Johann Heinrich Wilhelm Geißler (26 May 1814 in Igelshieb – 24 January 1879) was a skilled glassblower and physicist, famous for his invention of the Geissler tube, made of glass and used as a low pressure gas-discharge tube.
54ce77da304d5cd9f301a4a9e4d2f3e0
Gerard Kuiper Gerard Peter Kuiper ( ; ] ; born Gerrit Pieter Kuiper; December 7, 1905 – December 23, 1973) was a Dutch–American astronomer, planetary scientist, selenographer, author and professor. He is the eponymous namesake of the Kuiper belt. Kuiper is considered by many to be the father of modern planetary science. As professor at the University of Chicago, he was dissertation advisor to Carl Sagan. In 1958, the two worked on the classified military Project A119, the secret Air Force plan to detonate a nuclear warhead on the Moon.
52f829d4599ed33df8591d5ccaedaf91
Steinheil (crater) Steinheil is a lunar impact crater that is located in the rugged highlands in the southeastern part of the Moon. It forms a prominent crater pair with the similar-sized Watt, which it partly overlies to the southeast. To the northwest is the large walled plain Janssen. Due to the location of this crater, it appears foreshortened when viewed from the Earth. It is from the Nectarian period, 3.92 to 3.85 billion years ago.
65133a65b6c73addb5533fc2f42eb96b
John William Draper John William Draper (May 5, 1811 – January 4, 1882) was an English-American scientist, philosopher, physician, chemist, historian and photographer. He is credited with producing the first clear photograph of a female face (1839–40) and the first detailed photograph of the moon in 1840. He was also the first president of the American Chemical Society (1876–77) and a founder of the New York University School of Medicine. One of Draper's books, the "History of the Conflict between Religion and Science", popularised the conflict thesis proposing intrinsic hostility in the relationship between religion and science. It was widely read, and was translated into several languages. His son, Henry Draper, and his granddaughter, Antonia Maury, were astronomers, her younger sister, Carlotta Maury was a paleontologist, and his eldest son, John Christopher Draper, was a chemist.
438d85350519c80615b511c637c19da1
Florey (crater) Florey is a lunar impact crater on the lunar near side near the northern pole. Florey is directly adjacent to Byrd crater (diameter of 94 km) to the Southeast and Peary crater (diameter of 73 km) to the North. The crater is named after Australian scientist Howard Florey. The crater was named by the IAU in 2009.
40e69f0af3f21f230a54495b069ced31
Bunsen (crater) Bunsen is a lunar crater that lies near the northwestern limb of the Moon. It is located to the west of the Oceanus Procellarum and the crater von Braun. To the southeast is the crater Lavoisier, and to the northeast lies Gerard. Northwest of Bunsen, on the far side of the Moon, is McLaughlin. Due to its position this crater appears foreshortened when viewed from the Earth, and its visibility is affected by libration.
b8678a793fa0b68a4de5c96e75149761
Kundt (crater) Kundt is a small, bowl-shaped lunar impact crater in the northern section of the Mare Nubium, and is named after the German physicist August Kundt. It has a raised rim and is not significantly worn due to impact erosion. This crater lies part way between Guericke to the west and Davy in the east.
93f02cfa14cbb33c8b92ed3accb99352
Hermann Joseph Klein Hermann Joseph Klein (September 14, 1844 – July 1, 1914) was a German astronomer, author and professor. Born in Cologne, Germany on September 14, 1844, he attained his doctorate from the University of Cologne in 1874, and taught at the school. He was a member of the Selenographic Society and the crater Klein on the Moon is now named after him.
b3b7cbd14a380d0e70cd75bec95673e6
Optical Gravitational Lensing Experiment The Optical Gravitational Lensing Experiment or "OGLE" is a Polish astronomical project based at the University of Warsaw that is chiefly concerned with discovering dark matter using the microlensing technique. Since the project began in 1992, it has discovered several extrasolar planets as a bonus. The project is led by Andrzej Udalski, who is a co-author of the discovery of OGLE-2005-BLG-390Lb.
7157e05633614cae8264f0eacca7e566
Simon von Stampfer Simon Ritter von Stampfer (October 26, 1792 (according to other sources 1790), in Windisch-Mattrai, Archbishopric of Salzburg today called Matrei in Osttirol, Tyrol – November 10, 1864 in Vienna) was an Austrian mathematician, surveyor and inventor. His most famous invention is that of the stroboscopic disk which has a claim to be the first device to show moving images. Almost simultaneously similar devices were produced independently in Belgium (the phenakistiskop), and Britain (the zoetrope).
b47c7a100461d5596e8c845bc0d92854
Victor Janvier Victor Janvier (1851–1911) was a French sculptor and engraver notable for inventing the Janvier Reducing Machine, a type of lathe which improved the die making process within mints.
ac8fcf9d92355abc204f0b02b0909b1a
Janssen (lunar crater) Janssen is an ancient impact crater located in the highland region near the southeastern lunar limb. Due to the location of this crater, it appears foreshortened when viewed from the Earth. The entire structure has been heavily worn and is marked by many lesser crater impacts. The outer wall is breached in multiple locations, but the outline of the crater rim can still be observed. The wall forms a distinctive hexagonal shape upon the rugged lunar surface, with a slight curvature at the vertices.
efb9fa6b5f1a028294a6119d3e496a1b
Einstein (crater) Einstein is a large lunar crater that lies along the western limb of the Moon, making it difficult to observe from the Earth. The visibility of this formation is affected by libration effects, but even under the best conditions not much detail can be observed except from lunar orbit. Nearby craters of note include Moseley just to the north, Dalton along the eastern rim, Vasco da Gama just to the southeast, and Bohr to the south-southeast. The formation Vallis Bohr is visible to the south.
0e09e0d9f1db9179beeb00371c77f5f9
Uraniborg Uraniborg (Danish: "Uranienborg" , Swedish: "Uraniborg" ) was a Danish astronomical observatory and alchemical laboratory established and operated by Tycho Brahe. It was built  1576 – c. 1580 on Hven, an island in the Øresund between Zealand and Scania, which at that time was part of Denmark. Shortly after its construction, the observatory was expanded with an underground facility, Stjerneborg, on an adjacent site.
d2c4398304839d73caa0722ef06559b1
Graphic telescope The graphic telescope is a type of camera lucida that has the power of a telescope. It was invented by Cornelius Varley in 1811.