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Norio Kaifu
was a Japanese astronomer. He was best known as the president of the International Astronomical Union (IAU) from 2012 to 2015. He directed the Subaru telescope project, which housed the largest monolithic primary mirror in the world from its commission until 2005. Kaifu researched in radio astronomy, extragalactic astronomy, cosmic magnetic fields, non-stable stars, and infrared astronomy. The minor planet 6412 Kaifu is named in his honor. Kaifu died of pancreatic cancer on 13 April 2019, at the age of 75. Career Kaifu graduated from the University of Tokyo in 1972 with a PhD in radio astronomy. In the early 1980s, he organized bilateral collaborations with British astronomers, including the United Kingdom Infrared Telescope, which improved relations with international astronomers. He also began working with astronomers in China, South Korea, and Taiwan, and formed the East Asian Core Observatories Association, which built the East Asian Observatory in 2014. He became the cha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Astronomical Union
The International Astronomical Union (IAU; french: link=yes, Union astronomique internationale, UAI) is a nongovernmental organisation with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and development through global cooperation. It was founded in 1919 and is based in Paris, France. The IAU is composed of individual members, who include both professional astronomers and junior scientists, and national members, such as professional associations, national societies, or academic institutions. Individual members are organised into divisions, committees, and working groups centered on particular subdisciplines, subjects, or initiatives. As of 2018, the Union had over 13,700 individual members, spanning 90 countries, and 82 national members. Among the key activities of the IAU is serving as a forum for scientific conferences. It sponsors nine annual symposia and holds a triannual General Assembly that sets policy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interstellar Matter
In astronomy, the interstellar medium is the matter and radiation that exist in the space between the star systems in a galaxy. This matter includes gas in ionic, atomic, and molecular form, as well as dust and cosmic rays. It fills interstellar space and blends smoothly into the surrounding intergalactic space. The energy that occupies the same volume, in the form of electromagnetic radiation, is the interstellar radiation field. The interstellar medium is composed of multiple phases distinguished by whether matter is ionic, atomic, or molecular, and the temperature and density of the matter. The interstellar medium is composed, primarily, of hydrogen, followed by helium with trace amounts of carbon, oxygen, and nitrogen. The thermal pressures of these phases are in rough equilibrium with one another. Magnetic fields and turbulent motions also provide pressure in the ISM, and are typically more important, dynamically, than the thermal pressure is. In the interstellar medium, matt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Millimeter-wave Astronomy
Radio astronomy is a subfield of astronomy that studies celestial objects at radio frequencies. The first detection of radio waves from an astronomical object was in 1933, when Karl Jansky at Bell Telephone Laboratories reported radiation coming from the Milky Way. Subsequent observations have identified a number of different sources of radio emission. These include stars and galaxies, as well as entirely new classes of objects, such as radio galaxies, quasars, pulsars, and masers. The discovery of the cosmic microwave background radiation, regarded as evidence for the Big Bang theory, was made through radio astronomy. Radio astronomy is conducted using large radio antennas referred to as radio telescopes, that are either used singularly, or with multiple linked telescopes utilizing the techniques of radio interferometry and aperture synthesis. The use of interferometry allows radio astronomy to achieve high angular resolution, as the resolving power of an interferometer is s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toshiki Kaifu
was a Japanese politician who served as the 77th Prime Minister of Japan from 1989 to 1991. Early life and education Kaifu was born on 2 January 1931, in Nagoya City, the eldest of six brothers. His family's business Nakamura Photo Studio was established by his grandfather in the Meiji era, and was situated next to the Matsuzakaya flagship department store. Kaifu took the exam to the Aichi Prefectural Asahigaoka Senior High School, and while of the eleven students who took the test from the same school, nine were accepted and two, including Kaifu, were not. As part of the student labor mobilization during the war, he was placed in a Mitsui Heavy Industry factory where he assembled airplane engine parts day and night. In 1945, he was accepted in the Youth Airman Academy of the Imperial Japanese Army, but the war ended before his planned enrolment in October. He was then educated at Chuo University and Waseda University. On 17 November 1957 Kaifu married SaburÅ Yanagihara, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Makoto Kobayashi (physicist)
is a Japanese physicist known for his work on CP-violation who was awarded one-fourth of the 2008 Nobel Prize in Physics "for the discovery of the origin of the broken symmetry which predicts the existence of at least three families of quarks in nature." Early life and education Makoto Kobayashi was born in Nagoya, Japan in 1944. When he was two years old, Kobayashi's father Hisashi died. The Kobayashi family home was destroyed by the Bombing of Nagoya, so they stayed at his mother's (surnamed Kaifu) family house. One of Makoto's cousins, Toshiki Kaifu, the 51st Prime Minister of Japan, was living in the same place. His other cousin was an astronomer, Norio Kaifu. Many years later, Toshiki Kaifu recalled Kobayashi: "when he was a child, he was a quiet and lovely boy, always reading some difficult books in my room. I think this is the beginning of his sudden change into a genius." After graduating from the School of Science of Nagoya University in 1967, he obtained a DSc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nobel Laureate
The Nobel Prizes ( sv, Nobelpriset, no, Nobelprisen) are awarded annually by the Royal Swedish Academy of Sciences, the Swedish Academy, the Karolinska Institutet, and the Norwegian Nobel Committee to individuals and organizations who make outstanding contributions in the fields of chemistry, physics, literature, peace, and physiology or medicine. They were established by the 1895 will of Alfred Nobel, which dictates that the awards should be administered by the Nobel Foundation. The Nobel Memorial Prize in Economic Sciences was established in 1968 by the Sveriges Riksbank, the central bank of Sweden, for contributions to the field of economics. Each recipient, a Nobelist or ''laureate'', receives a gold medal, a diploma, and a sum of money which is decided annually by the Nobel Foundation. Prize Each prize is awarded by a separate committee; the Royal Swedish Academy of Sciences awards the Prizes in Physics, Chemistry, and Economics; the Karolinska Institute awards the Prize ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protoplanetary Disk
A protoplanetary disk is a rotating circumstellar disc of dense gas and dust surrounding a young newly formed star, a T Tauri star, or Herbig Ae/Be star. The protoplanetary disk may also be considered an accretion disk for the star itself, because gases or other material may be falling from the inner edge of the disk onto the surface of the star. This process should not be confused with the accretion process thought to build up the planets themselves. Externally illuminated photo-evaporating protoplanetary disks are called proplyds. Formation Protostars form from molecular clouds consisting primarily of molecular hydrogen. When a portion of a molecular cloud reaches a critical size, mass, or density, it begins to collapse under its own gravity. As this collapsing cloud, called a solar nebula, becomes denser, random gas motions originally present in the cloud average out in favor of the direction of the nebula's net angular momentum. Conservation of angular momentum causes t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Star Formation
Star formation is the process by which dense regions within molecular clouds in The "medium" is present further soon.-->interstellar space, sometimes referred to as "stellar nurseries" or "-forming regions", and form s. As a branch of , star formation includes the study of the |
Acousto-optical Spectrometer
An acousto-optical spectrometer (AOS) is based on the diffraction of light by ultrasonic waves. A piezoelectric transducer, driven by the RF signal (from the receiver), generates an acoustic wave in a crystal (the so-called Bragg-cell). This acoustic wave modulates the refractive index and induces a phase grating. The Bragg-cell is illuminated by a collimated laser beam. The angular dispersion of the diffracted light represents a true image of the IF-spectrum according to the amplitude and wavelengths of the acoustic waves in the crystal. The spectrum is detected by using a single linear diode array ( CCD), which is placed in the focal plane of an imaging optics. Depending on the crystal and the focal length of the imaging optics, the resolution of this type of spectrometer can be varied. See also * Acousto-optics * Acousto-optic modulator * Acousto-optic deflector * Nonlinear optics Nonlinear optics (NLO) is the branch of optics that describes the behaviour of light in ''n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, ultraviolet, X-ray, infrared and radio waves that radiate from stars and other celestial objects. A stellar spectrum can reveal many properties of stars, such as their chemical composition, temperature, density, mass, distance and luminosity. Spectroscopy can show the velocity of motion towards or away from the observer by measuring the Doppler shift. Spectroscopy is also used to study the physical properties of many other types of celestial objects such as planets, nebulae, galaxies, and active galactic nuclei. Background Astronomical spectroscopy is used to measure three major bands of radiation in the electromagnetic spectrum: visible light, radio waves, and X-rays. While all spectroscopy looks at specific bands of the spectrum, different methods are required to acquire the signal depending on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Open University Of Japan
is a distance learning university which has students from all over Japan; it accepted its first students in 1985. History Although founded by the national government initiative with a single-issue law and heavily subsidized by the government, it was established by as a , the university classified as a private university in Japan. It was founded on the basic system of The Open University in the United Kingdom. The administration is based in Chiba City although it has offices and learning centers in each of Japan's 47 prefectures. The university offers accredited undergraduate and graduate degrees. With nearly 90,000 students enrolled (in 2007), 45,000 students graduated from the university. It is one of the largest academic institutions in the nation, and qualifies as one of the world's mega universities. Since it was founded, over 780,000 students have taken courses from the institution. Faculty of Liberal Arts Bachelor's degree courses are available in six areas of study ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
