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Jonathan McDowell
Jonathan Christopher McDowell (born 1960) is an astronomer and astrophysicist at the Harvard–Smithsonian Center for Astrophysics. He is a staff member at the Chandra X-ray Observatory, Chandra X-ray Center. McDowell is the author and editor of Jonathan's Space Report, an e-mail-distributed newsletter documenting satellite launches. Education and career McDowell has a BA in Mathematics (1981) from Churchill College, Cambridge, Churchill College and a PhD in Astrophysics (1986) from the Institute of Astronomy, Cambridge, Institute of Astronomy, both at the University of Cambridge, England. After high school, McDowell worked for six months at the Royal Greenwich Observatory, Royal Observatory, Greenwich and held a summer job at the Royal Observatory, Edinburgh before he began his PhD studies. His first post-doctoral position was at Jodrell Bank Observatory, Jodrell Bank followed by another at the Harvard-Smithsonian Center for Astrophysics, Center for Astrophysics Harvard & Smit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomer
An astronomer is a scientist in the field of astronomy who focuses their studies on a specific question or field outside the scope of Earth. They observe astronomical objects such as stars, planets, moons, comets and galaxies – in either observational (by analyzing the data) or theoretical astronomy. Examples of topics or fields astronomers study include planetary science, solar astronomy, the origin or evolution of stars, or the formation of galaxies. A related but distinct subject is physical cosmology, which studies the Universe as a whole. Types Astronomers usually fall under either of two main types: observational and theoretical. Observational astronomers make direct observations of celestial objects and analyze the data. In contrast, theoretical astronomers create and investigate models of things that cannot be observed. Because it takes millions to billions of years for a system of stars or a galaxy to complete a life cycle, astronomers must observe snapsh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
History Of Spaceflight
Spaceflight began in the 20th century following theoretical and practical breakthroughs by Konstantin Tsiolkovsky, Robert H. Goddard, and Hermann Oberth. First successful large-scale rocket programs were initiated in the 1920s Germany by Fritz von Opel and Max Valier, and eventually in Nazi Germany by Wernher von Braun. The Soviet Union took the lead in the post-war Space Race, launching the first satellite, the first man and the first woman into orbit. The United States caught up with, and then passed, their Soviet rivals during the mid-1960s, landing the first men on the Moon in 1969. In the same period, France, the United Kingdom, Japan and China were concurrently developing more limited launch capabilities. Following the end of the Space Race, spaceflight has been characterized by greater international co-operation, cheaper access to low Earth orbit and an expansion of commercial ventures. Interplanetary probes have visited all of the planets in the Solar System, and human ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1960 Births
Year 196 ( CXCVI) was a leap year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Dexter and Messalla (or, less frequently, year 949 ''Ab urbe condita''). The denomination 196 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Emperor Septimius Severus attempts to assassinate Clodius Albinus but fails, causing Albinus to retaliate militarily. * Emperor Septimius Severus captures and sacks Byzantium; the city is rebuilt and regains its previous prosperity. * In order to assure the support of the Roman legion in Germany on his march to Rome, Clodius Albinus is declared Augustus by his army while crossing Gaul. * Hadrian's wall in Britain is partially destroyed. China * First year of the '' Jian'an era of the Chinese Han Dynasty. * Em ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bustle Digital Group
''Bustle'' is an online American women's magazine founded in August 2013 by Bryan Goldberg. It positions news and politics alongside articles about beauty, celebrities, and fashion trends. By September 2016, the website had 50 million monthly readers. History ''Bustle'' was founded by Bryan Goldberg in 2013. Previously, Goldberg co-founded the website Bleacher Report with a single million-dollar investment. He claimed that "women in their 20s have nothing to read on the Internet." ''Bustle'' was launched with $6.5 million in backing from Seed and Series A funding rounds. It surpassed 10 million monthly unique visitors in July 2014, placing it ahead of rival women-oriented sites such as ''Refinery29'', ''Rookie'' and ''xoJane''; it had the second greatest number of unique visitors after Gawker's ''Jezebel''. By 2015, ''Bustle'' had 46 full-time editorial staff and launched the parenting sister site ''Romper''. In September 2016, ''Bustle'' launched a redesign using the company's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Planned Parenthood
The Planned Parenthood Federation of America, Inc. (PPFA), or simply Planned Parenthood, is a nonprofit organization that provides reproductive health care in the United States and globally. It is a tax-exempt corporation under Internal Revenue Code section 501(c)(3) and a member association of the International Planned Parenthood Federation (IPPF). PPFA has its roots in Brooklyn, New York, where Margaret Sanger opened the first birth control clinic in the United States, in 1916. Sanger founded the American Birth Control League in 1921, and 14 years after her exit as its president, ABCL's successor organization became Planned Parenthood in 1942. Planned Parenthood consists of 159 medical and non-medical affiliates, which operate over 600 health clinics in the United States. It partners with organizations in 12 countries globally. The organization directly provides a variety of reproductive health services and sexual education, contributes to research in reproductive te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Main-belt
The asteroid belt is a torus-shaped region in the Solar System, located roughly between the orbits of the planets Jupiter and Mars. It contains a great many solid, irregularly shaped bodies, of many sizes, but much smaller than planets, called asteroids or minor planets. This asteroid belt is also called the main asteroid belt or main belt to distinguish it from other asteroid populations in the Solar System such as near-Earth asteroids and trojan asteroids. The asteroid belt is the smallest and innermost known circumstellar disc in the Solar System. About 60% of its mass is contained in the four largest asteroids: Ceres, Vesta, Pallas, and Hygiea. The total mass of the asteroid belt is calculated to be 3% that of the Moon. Ceres, the only object in the asteroid belt large enough to be a dwarf planet, is about 950 km in diameter, whereas Vesta, Pallas, and Hygiea have mean diameters less than 600 km. The remaining bodies range down to the size of a dust particl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Astronomical Society
The American Astronomical Society (AAS, sometimes spoken as "double-A-S") is an American society of professional astronomers and other interested individuals, headquartered in Washington, DC. The primary objective of the AAS is to promote the advancement of astronomy and closely related branches of science, while the secondary purpose includes enhancing astronomy education and providing a political voice for its members through lobbying and grassroots activities. Its current mission is to enhance and share humanity's scientific understanding of the universe as a diverse and inclusive astronomical community. History The society was founded in 1899 through the efforts of George Ellery Hale. The constitution of the group was written by Hale, George Comstock, Edward Morley, Simon Newcomb and Edward Charles Pickering. These men, plus four others, were the first Executive Council of the society; Newcomb was the first president. The initial membership was 114. The AAS name of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sky And Telescope
''Sky & Telescope'' (''S&T'') is a monthly American magazine covering all aspects of amateur astronomy, including the following: *current events in astronomy and space exploration; *events in the amateur astronomy community; *reviews of astronomical equipment, books, and computer software; *amateur telescope making; and *astrophotography. The articles are intended for the informed lay reader and include detailed discussions of current discoveries, frequently by participating scientists. The magazine is illustrated in full color, with both amateur and professional photography of celestial sights, as well as tables and charts of upcoming celestial events. History ''Sky & Telescope'' was founded by Charles A Federer and his wife Helen Spence Federer and began publication at Harvard College Observatory in November 1941, as a result of the merger of the separate magazines, '' The Sky'' and ''The Telescope''. In 2005, Sky Publishing Corporation was acquired by New Track Media, a portf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inverse (website)
''Inverse'' is an online magazine from Bustle Digital Group, covering topics such as technology, science, and culture for a millennial audience. History Launched in 2015 by Dave Nemetz, co-founder of ''Bleacher Report'', the site was made possible through seed funding with its headquarters in San Francisco, California and the editorial staff initially based in Brooklyn, New York. As of August 2016, the site had over 4.9 million U.S. multiplatform unique visitors. The company raised a $6 million Series A funding in 2016, led by Crosslink Capital with participation from Bertelsmann Digital Media Investments. In 2017, the headquarters was moved to SoHo, Manhattan, New York City with an expanded staff of approximately 30 full-time employees and 25 freelancers. In September 2017, the company debuted two shows on the Facebook Watch platform. On August 15, 2018, six staff writers (15 percent of the staff) were laid off after it was reported that the site's monthly unique visit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fédération Aéronautique Internationale
The (; FAI; en, World Air Sports Federation) is the world governing body for air sports, and also stewards definitions regarding human spaceflight. It was founded on 14 October 1905, and is headquartered in Lausanne, Switzerland. It maintains world records for aeronautical activities, including ballooning, aeromodeling, and unmanned aerial vehicles (drones), as well as flights into space. History The FAI was founded at a conference held in Paris 12–14 October 1905, which was organized following a resolution passed by the Olympic Congress held in Brussels on 10 June 1905 calling for the creation of an Association "to regulate the sport of flying, ... the various aviation meetings and advance the science and sport of Aeronautics." The conference was attended by representatives from 8 countries: Belgium (Aero Club Royal de Belgique, founded 1901), France ( Aéro-Club de France, 1898), Germany ( Deutscher Aero Club e.V.), Great Britain ( Royal Aero Club, 1901), Italy (Ae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kármán Line
The Kármán line (or von Kármán line ) is an attempt to define a boundary between Earth's atmosphere and outer space, and offers a specific definition set by the Fédération aéronautique internationale (FAI), an international record-keeping body for aeronautics. Defining the edge of space is important for legal and regulatory purposes since aircraft and spacecraft fall under different jurisdictions and are subject to different treaties. International law does not define the edge of space, or the limit of national airspace. The FAI defines the Kármán line as space beginning above Earth's mean sea level. This number is well above the altitude reachable by a conventional airplane and is roughly where satellites, even on very eccentric trajectories, will decay before completing a single orbit. While experts disagree on exactly where the atmosphere ends and space begins, most regulatory agencies (including the United Nations) accept the FAI Kármán line definition or someth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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