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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, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Supernova 2008 Ha
A supernova is a powerful and luminous explosion of a star. It has the plural form supernovae or supernovas, and is abbreviated SN or SNe. This transient astronomical event 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. The peak optical luminosity of a supernova can be comparable to that of an entire galaxy before fading over several weeks or months. Supernovae are more energetic than novae. In Latin language, Latin, ''nova'' means "new", referring astronomically to what appears to be a temporary new bright star. Adding the prefix "super-" distinguishes supernovae from ordinary novae, which are far less luminous. The word ''supernova'' was coined by Walter Baade and Fritz Zwicky in 1929. The last supernova to be directly observed in the Milky Way was Kepler's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arizona
Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a state in the Southwestern United States. It is the 6th largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona is part of the Four Corners region with Utah to the north, Colorado to the northeast, and New Mexico to the east; its other neighboring states are Nevada to the northwest, California to the west and the Mexican states of Sonora and Baja California to the south and southwest. Arizona is the 48th state and last of the contiguous states to be admitted to the Union, achieving statehood on February 14, 1912. Historically part of the territory of in New Spain, it became part of independent Mexico in 1821. After being defeated in the Mexican–American War, Mexico ceded much of this territory to the United States in 1848. The southernmost portion of the state was acquired in 1853 through the Gadsden Purchase. Southern Arizona is known for its desert cl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michelle Obama
Michelle LaVaughn Robinson Obama (born January 17, 1964) is an American attorney and author who served as first lady of the United States from 2009 to 2017. She was the first African-American woman to serve in this position. She is married to former President Barack Obama. 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 Barack Obama. She subsequently worked in nonprofits and as the associate dean of Student Services at the University of Chicago as well as the vice president for Community and External Affairs of the University of Chicago Medical Center. Michelle married Barack in 1992, and together they have two daughters. Obama campaigned for her husband's presidential bid throughout 2007 and 2008, delivering a keynote address at the 2008 Democratic National Convention. She has subsequently delivered acclaimed speeches at the 2012, 2016 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barack Obama
Barack Hussein Obama II ( ; born August 4, 1961) is an American politician who served as the 44th president of the United States from 2009 to 2017. A member of the Democratic Party, Obama was the first African-American president of the United States. He previously served as a U.S. senator from Illinois from 2005 to 2008 and as an Illinois state senator from 1997 to 2004, and previously worked as a civil rights lawyer before entering politics. Obama was born in Honolulu, Hawaii. After graduating from Columbia University in 1983, he worked as a community organizer in Chicago. In 1988, he enrolled in Harvard Law School, where he was the first black president of the '' Harvard Law Review''. After graduating, he became a civil rights attorney and an academic, teaching constitutional law at the University of Chicago Law School from 1992 to 2004. Turning to elective politics, he represented the 13th district in the Illinois Senate from 1997 until 2004, when he ran for the U ... [...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 of America. The president directs the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces. The power of the presidency has grown substantially since the first president, George Washington, took office in 1789. While presidential power has ebbed and flowed over time, the presidency has played an increasingly strong role in American political life since the beginning of the 20th century, with a notable expansion during the presidency of Franklin D. Roosevelt. In contemporary times, the president is also looked upon as one of the world's most powerful political figures as the leader of the only remaining global superpower. As the leader of the nation with the largest economy by nominal GDP, the president possesses significant domestic and international hard and soft power. Article II of the Constitution establ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Universe Today
Universe Today (U.T.) is a popular North American-based non-commercial space and astronomy news website. The domain was registered on December 30, 1998, and the website went live in March 1999, founded by Canadian Fraser Cain. The ''Universe Today'' assumed its current form on July 24, 2003, featuring astronomy news and space-related issues. By early September 2005, the forum section merged with ''Bad Astronomy'' as 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'' * ''The Space Show ''The ... [...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 land-grant research university in Berkeley, California. Established in 1868 as the University of California, it is the state's first land-grant university and the founding campus of the University of California system. Its fourteen colleges and schools offer over 350 degree programs and enroll some 31,800 undergraduate and 13,200 graduate students. Berkeley ranks among the world's top universities. A founding member of the Association of American Universities, Berkeley hosts many leading research institutes dedicated to science, engineering, and mathematics. The university founded and maintains close relationships with three national laboratories at Berkeley, Livermore and Los Alamos, and has played a prominent role in many scientific advances, from the Manhattan Project and the discovery of 16 chemical elements to breakthroughs in computer science and genomics. Berkeley is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fox News
The Fox News Channel, abbreviated FNC, commonly known as Fox News, and stylized in all caps, is an American multinational conservative cable news television channel based in New York City. It is owned by Fox News Media, which itself is owned by the Fox Corporation. The channel broadcasts primarily from studios at 1211 Avenue of the Americas in Midtown Manhattan. Fox News provides service to 86 countries and overseas territories worldwide, with international broadcasts featuring Fox Extra segments during ad breaks. The channel was created by Australian-American media mogul Rupert Murdoch in 1996 to appeal to a conservative audience, hiring former Republican media consultant and CNBC executive Roger Ailes as its founding CEO. It launched on October 7, 1996, to 17 million cable subscribers. Fox News grew during the late 1990s and 2000s to become the dominant United States cable news subscription network. , approximately 87,118,000 U.S. households (90.8% of television subscr ... [...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 in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georgetown University
Georgetown University is a private university, private research university in the Georgetown (Washington, D.C.), Georgetown neighborhood of Washington, D.C. Founded by Bishop John Carroll (archbishop of Baltimore), John Carroll in 1789 as Georgetown College (Georgetown University), Georgetown College, the university has grown to comprise eleven Undergraduate education, undergraduate and Postgraduate education, graduate schools, including the School of Foreign Service, Walsh School of Foreign Service, McDonough School of Business, Georgetown University School of Medicine, Medical School, Georgetown University Law Center, Law School, and a Georgetown University in Qatar, campus in Qatar. The school's main campus, on a hill above the Potomac River, is identifiable by its flagship Healy Hall, a National Historic Landmark. The school was founded by and is affiliated with the Society of Jesus, and is the oldest Catholic institution of higher education in the United States, though the m ... [...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] |
Isotopes Of Nickel
Naturally occurring nickel (28Ni) is composed of five stable isotopes; , , , and , with being the most abundant (68.077% natural abundance). 26 radioisotopes have been characterised with the most stable being with a half-life of 76,000 years, with a half-life of 100.1 years, and with a half-life of 6.077 days. All of the remaining radioactive isotopes have half-lives that are less than 60 hours and the majority of these have half-lives that are less than 30 seconds. This element also has 8 meta states. List of isotopes , - , , style="text-align:right" , 28 , style="text-align:right" , 20 , 48.01975(54)# , 10# ms 500 ns, , , 0+ , , , - , , style="text-align:right" , 28 , style="text-align:right" , 21 , 49.00966(43)# , 13(4) ms 2(+5−3) ms, , , 7/2−# , , , - , , style="text-align:right" , 28 , style="text-align:right" , 22 , 49.99593(28)# , 9.1(18) ms , β+ , 50Co , 0+ , , , - , , style="text-align:right" , ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
