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SN 2008ha
SN 2008ha was a type Ia supernova which was first observed around November 7, 2008 in the galaxy UGC 12682, which lies in the constellation Pegasus at a distance of about from Earth. SN 2008ha was unusual in several ways: with an absolute V band magnitude of −14.2 it is one of the faintest supernovae ever observed; its host galaxy type very rarely produces supernovae. Another unusual feature of SN 2008ha was its low expansion velocity of only ~2000 km/s at maximum brightness, which indicates a very small kinetic energy released in the explosion. For comparison, SN 2002cx expanded at a velocity of ~5000 km/s whereas typical SN Ia expand at around ~10,000 km/s. The low expansion velocity of SN2008ha resulted in relatively small Doppler broadening of spectral emission lines and this led to higher quality data. The supernova was studied with ultraviolet, optical, and near-infrared photometry as well as optical spectra, using the Magellan telescopes in Chile, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Supernova 2008 Ha
A supernova (: supernovae or supernovas) is a powerful and luminous explosion of a star. A supernova occurs during the last stellar evolution, evolutionary stages of a massive star, or when a white dwarf is triggered into runaway nuclear fusion. The original object, called the ''progenitor'', either collapses to a neutron star or black hole, or is completely destroyed to form a diffuse nebula. The peak optical luminosity of a supernova can be comparable to that of an entire galaxy before fading over several weeks or months. The last supernova directly observed in the Milky Way was Kepler's Supernova in 1604, appearing not long after Tycho's Supernova in 1572, both of which were visible to the naked eye. The supernova remnant, remnants of more recent supernovae have been found, and observations of supernovae in other galaxies suggest they occur in the Milky Way on average about three times every century. A supernova in the Milky Way would almost certainly be observable through mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gemini Observatory
The Gemini Observatory comprises two 8.1-metre (26.6 ft) telescopes, Gemini North and Gemini South, situated in Hawaii and Chile, respectively. These twin telescopes offer extensive coverage of the northern and southern skies and rank among the most advanced optical/infrared astronomy, infrared telescopes available to astronomers. ''(See List of largest optical reflecting telescopes)''. The observatory is owned and operated by the National Science Foundation (NSF) of the United States, the National Research Council Canada, National Research Council of Canada, CONICYT of Chile, MCTI of Brazil, MCTIP of Argentina, and Korea Astronomy and Space Science Institute, Korea Astronomy and Space Science Institute (KASI) of Republic of Korea. The NSF is the primary funding contributor, providing about 70% of the required resources. The Association of Universities for Research in Astronomy (AURA) manages the operations and maintenance of the observatory through a cooperative agreement wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zombie Star
A type Iax supernova is a rare subtype of type Ia supernova, which leaves behind a remnant star, known as zombie star, rather than completely dispersing the white dwarf. Type Iax supernovae are similar to type Ia, but have a lower ejection velocity and lower luminosity. Type Iax supernovae may occur at a rate between 5 and 30 percent of the Ia supernova rate. As of October 2014, thirty supernovae had been identified in this category. In a binary system consisting of a white dwarf and a companion star, the white dwarf strips away material from its companion. Normally the white dwarf would eventually reach a critical mass, and fusion reactions would make it explode and completely dissipate it, but in a Type Iax supernova, only a part of the dwarf's mass is lost. Candidate observed instances Supernova SN 2012Z in the galaxy NGC 1309 is thought to be of type Iax, and was discovered by Brad Cenko, Weidong Li, and Alex Filippenko using the Katzman Automatic Imaging Telesco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michelle Obama
Michelle LaVaughn Robinson Obama ( Robinson; born January 17, 1964) is an American attorney and author who served as the first lady of the United States from 2009 to 2017, being married to Barack Obama, the 44th president of the United States. Raised on the South Side of Chicago, Obama is a graduate of Princeton University and Harvard Law School. In her early legal career, she worked at the law firm Sidley Austin where she met her future husband. She subsequently worked in nonprofits and as the associate dean of student services at the University of Chicago. Later, she served as vice president for community and external affairs of the University of Chicago Medical Center. Michelle married Barack in 1992, and they have two daughters. Obama campaigned for her husband's Barack Obama 2008 presidential campaign, 2008 and Barack Obama 2012 presidential campaign, 2012 presidential campaigns. She was the first African-American woman to serve as first lady. As first lady, Obama work ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barack Obama
Barack Hussein Obama II (born August 4, 1961) is an American politician who was the 44th president of the United States from 2009 to 2017. A member of the Democratic Party, he was the first African American president in American history. Obama previously served as a U.S. senator representing Illinois from 2005 to 2008 and as an Illinois state senator from 1997 to 2004. Born in Honolulu, Hawaii, Obama graduated from Columbia University in 1983 with a Bachelor of Arts degree in political science and later worked as a community organizer in Chicago. In 1988, Obama enrolled in Harvard Law School, where he was the first black president of the ''Harvard Law Review''. He became a civil rights attorney and an academic, teaching constitutional law at the University of Chicago Law School from 1992 to 2004. In 1996, Obama was elected to represent the 13th district in the Illinois Senate, a position he held until 2004, when he successfully ran for the U.S. Senate. In the 2008 pre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
President Of The United States
The president of the United States (POTUS) is the head of state and head of government of the United States. The president directs the Federal government of the United States#Executive branch, executive branch of the Federal government of the United States, federal government and is the Powers of the president of the United States#Commander-in-chief, commander-in-chief of the United States Armed Forces. The power of the presidency has grown since the first president, George Washington, took office in 1789. While presidential power has ebbed and flowed over time, the presidency has played an increasing role in American political life since the beginning of the 20th century, carrying over into the 21st century with some expansions during the presidencies of Presidency of Franklin D. Roosevelt, Franklin D. Roosevelt and Presidency of George W. Bush, George W. Bush. In modern times, the president is one of the world's most powerful political figures and the leader of the world's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Universe Today
Universe Today (U.T.) is a North American-based non-commercial space and astronomy news website founded by Fraser Cain. The domain was registered on December 30, 1998, and the website went live in March 1999. ''Universe Today'' assumed its current form on July 24, 2003, featuring astronomy news and other space-related content. In early September 2005, the website’s forum section merged with '' Bad Astronomy'' to create a combined site with the BAUT forum. During April 2011, the Association of British Science Writers noted that ''Universe Today'' decided not to make preparations for reporting on embargoed stories until they are public knowledge. Emily Lakdawalla said that she relies on ''Universe Today'' and '' Bad Astronomy'' to "give ... an independent look at big news stories". Publications ''Universe Today'' has published two books, which are available both as e-books and on physical media: * * See also * '' Astronomy Cast'' * ''Space.com Space.com is an on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of California, Berkeley
The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California), is a Public university, public Land-grant university, land-grant research university in Berkeley, California, United States. Founded in 1868 and named after the Anglo-Irish philosopher George Berkeley, it is the state's first land-grant university and is the founding campus of the University of California system. Berkeley has an enrollment of more than 45,000 students. The university is organized around fifteen schools of study on the same campus, including the UC Berkeley College of Chemistry, College of Chemistry, the UC Berkeley College of Engineering, College of Engineering, UC Berkeley College of Letters and Science, College of Letters and Science, and the Haas School of Business. It is Carnegie Classification of Institutions of Higher Education, classified among "R1: Doctoral Universities – Very high research activity". Lawrence Berkeley National Laboratory was originally founded as par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fox News
The Fox News Channel (FNC), commonly known as Fox News, is an American Multinational corporation, multinational Conservatism in the United States, conservative List of news television channels, news and political commentary Television station, television channel and website based in New York City, U.S. It is owned by Fox News Media, which itself is owned by Fox Corporation. It is the most-watched cable news network in the U.S., and as of 2023 it generates approximately 70% of its parent company's pre-tax profit. The channel broadcasts primarily from studios at 1211 Avenue of the Americas in Midtown Manhattan. Fox News provides a service to 86 countries and territories, with international broadcasts featuring Fox Extra segments during advertising breaks. The channel was created by Australian-born American media mogul Rupert Murdoch in 1996 to appeal to a conservative audience, hiring former Republican Party (United States), Republican media consultant and CNBC executive Roger ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Warwick, New York
Warwick is a town in the southwestern part of Orange County, New York, United States. Its population was 32,027 at the 2020 census. The town contains three villages (Florida, Greenwood Lake, and Warwick) and eight hamlets ( Amity, Bellvale, Edenville, Little York, Wisner, New Milford, Pine Island, and Sterling Forest). History In the early 1700s, one of the original patent holders, Benjamin Aske, named his land "Warwick", presumably after an area of England near his original ancestral home. He began to sell it off to settlers in 1719. His first parcel of land, 100 acres, was sold to Lawrence Decker. Other familiar family names of the Valley appeared in subsequent years. The European population of the valley grew rapidly from 1730 to 1765, and the previously existing populations of indigenous native people declined as forests and land were cleared for pasture and were re-organized. By the start of the American Revolution, almost all of the native population had disappeared i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georgetown University
Georgetown University is a private university, private Jesuit research university in Washington, D.C., United States. Founded by Bishop John Carroll (archbishop of Baltimore), John Carroll in 1789, it is the oldest Catholic higher education, Catholic institution of higher education in the United States, the oldest university in Washington, D.C., and the nation's first University charter#Federal, federally chartered university. The university has eleven Undergraduate education, undergraduate and Postgraduate education, graduate schools. Its main campus, located in the Georgetown (Washington, D.C.), Georgetown historic neighborhood, is on a hill above the Potomac River and identifiable by Healy Hall, a National Historic Landmark. It is Carnegie Classification of Institutions of Higher Education, classified among List_of_research_universities_in_the_United_States#Universities_classified_as_"R1:_Doctoral_Universities_–_Very_high_research_activity", "R1: Doctoral Universities – V ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Puckett Observatory
Puckett Observatory is a private astronomical observatory located in the state of Georgia. It is owned and operated by Tim Puckett. Its primary observation goals are the study of comets and the discovery of supernovae. To facilitate the latter goal it sponsors the Puckett Observatory World Supernova Search whose astronomers have discovered 369 supernovae. Telescopes The Puckett Observatory houses two telescopes. The 60 cm (24") Ritchey–Chrétien telescope was custom engineered and built by Puckett, and took nine years to complete, going online full-time in 1997. The telescope features a new type of hybrid disk/band worm drive designed by Puckett in 1993. It is one of the largest telescopes in the state. The other observatory telescope includes a Celestron C-14 Schmidt–Cassegrain with a Software Bisque's Paramount ME Robotic Telescope System. World Supernova Search The Puckett Observatory World Supernova Search was formed in 1998, with its principal investigator b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
