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Palomar Observatory: Encyclopedia Ii - Palomar Observatory - Palomar Observatory Sky Survey
The Palomar Observatory Sky Survey (POSS), sponsored by the National Geographic institute, was completed in 1958 (The first plates were s...
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Mauna Kea Observatory: Encyclopedia Ii - Mauna Kea Observatory - Telescopes
Telescopes found at Mauna Kea Observatory are funded by government agencies of various nations. The University of Hawai'i itself directly...
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California Institute Of Technology: Encyclopedia - California Institute Of Technology
The California Institute of Technology (commonly referred to as Caltech) is a private, coeducational university located in Pasadena, Cali...
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Carnegie Institution Of Washington: Encyclopedia - Carnegie Institution Of Washington
The Carnegie Institution of Washington (CIW) is a foundation established by Andrew Carnegie in 1902 to support scientific research. Its f...
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Brown Dwarf: Encyclopedia - Brown Dwarf
Brown dwarfs are sub-stellar objects (~5 to 90 Jupiter masses) that do not fuse hydrogen into helium in their cores, as do stars on the m...
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Active Optics: Encyclopedia - Active Optics
Active optics is a relatively new technology for reflecting telescopes. Active optics works by "actively" adjusting the telescope's mirro...
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1948: Encyclopedia - 1948
1948 (MCMXLVIII) is a leap year starting on Thursday (link will take you to calendar).
1948 - Events.
1948 - January-February.
Januar...
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2063 Bacchus: Encyclopedia - 2063 Bacchus
The Apollo, Venus- and Mars-crosser asteroid 2063 Bacchus was discovered on April 24, 1977 by Charles T. Kowal at the Palomar Observatory...
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50000 Quaoar: Encyclopedia - 50000 Quaoar
50000 Quaoar (pronounced kwaa'·waar or kwow'·ər, Tongva [ˈqʷɑoɑr]) [1] is a Trans-Neptunian object orbiting the Sun in the Edgewor...
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1810 Epimetheus: Encyclopedia - 1810 Epimetheus
1810 Epimetheus is an asteroid that was discovered on September 24, 1960 by Cornelis Johannes Van Houten, Ingrid Van Houten-Groeneveld, a...
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90377 Sedna: Encyclopedia - 90377 Sedna
90377 Sedna is a trans-Neptunian object, discovered by Michael Brown (Caltech), Chad Trujillo (Gemini Observatory) and David Rabinowitz (...
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4769 Castalia: Encyclopedia Ii - 4769 Castalia - General Information
Castalia's orbit took it within eleven lunar distances of Earth, allowing it to be scanned with radar from the Arecibo Observatory by Sco...
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Gamma Ray Burst: Encyclopedia Ii - Gamma Ray Burst - What Is A Grb?
Gamma ray burst - Early theories.
The combination of obvious brightness and implied distance of GRB 990123 led to two possibilities.
Th...
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Reflecting Telescope: Encyclopedia Ii - Reflecting Telescope - Reflecting Telescope Designs
Reflecting telescope - Schmidt camera.
The Schmidt camera, invented by Bernhard Schmidt, is not technically a telescope since the light...
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Schmidt Camera: Encyclopedia Ii - Schmidt Camera - Invention And Design
The Schmidt camera was designed by Bernhard Schmidt (1879-1935). Its optical components are an easy to make spherical primary mirror, and...
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90377 Sedna: Encyclopedia Ii - 90377 Sedna - General Information
Sedna was discovered during a survey conducted with the Samuel Oschin telescope at Palomar Observatory near San Diego, California (USA) a...
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1948: Encyclopedia Ii - 1948 - Events
1948 - January-February.
January 1 - Nationalisation of UK railways to form British Railways. Arab militants lay siege to the Jewish Q...
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San Diego County California: Encyclopedia Ii - San Diego County California - History
European settlement in what is now San Diego County began with the founding of the Mission San Diego de Alcala by the Spanish, in 1769.
S...
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Mount Wilson Observatory: Encyclopedia Ii - Mount Wilson Observatory - 60 Inch 1.5 M Hale Telescope
George Ellery Hale received the 60 inch (1.5 m) blank mirror, cast by Saint Gobain in France, in 1896 as a gift from his father, William ...
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California Institute Of Technology: Encyclopedia Ii - California Institute Of Technology - History
Modern Caltech grew from a vocational school founded in Pasadena in 1891 by local businessman and politician Amos G. Throop. The school w...
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Brown Dwarf: Encyclopedia Ii - Brown Dwarf - In Theory
Brown dwarf - Distinguishing heavy brown dwarfs from light stars.
Lithium: Lithium is generally present in brown dwarfs and not in low-...
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Reflecting Telescope: Encyclopedia Ii - Reflecting Telescope - Reflecting Telescope Designs
Reflecting telescope - Newtonian focus.
The Newtonian usually has a paraboloid primary mirror but for small apertures, say 12cm or less...
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Reflecting Telescope: Encyclopedia Ii - Reflecting Telescope - Technical Considerations
A curved primary mirror is the reflector telescope's basic optical element and creates an image at the focal plane. The distance from the...
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Schmidt Camera: Encyclopedia Ii - Schmidt Camera - Applications
The Schmidt camera is typically used as a survey instrument, for research programs in which a large amount of sky must be covered. These ...
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90377 Sedna: Encyclopedia Ii - 90377 Sedna - Orbital Characteristics
Sedna has a highly elliptical orbit, with its aphelion estimated at 975 AU and its perihelion at about 76.16 AU. At its discovery it was ...
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90377 Sedna: Encyclopedia Ii - 90377 Sedna - Physical Characteristics
Sedna has an estimated diameter of between 1180 and 1800 kilometres (730 to 1120 miles). At the time of its discovery it was the largest ...
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Reflecting Telescope: Encyclopedia Ii - Reflecting Telescope - Focal Planes
Reflecting telescope - Prime focus.
In a prime focus design in large observatory telescopes, the observer sits inside the telescope, at...
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San Diego County California: Encyclopedia Ii - San Diego County California - Sites Of Interest
San Diego County California - Observatories.
Mount Laguna Observatory - owned and operated by San Diego State University (SDSU)
Palo...
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San Diego County California: Encyclopedia Ii - San Diego County California - Cities And Towns In San Diego County
Incorporated Cities
Carlsbad (Aviara, La Costa)
Chula Vista
Coronado
Del Mar
El Cajon
Encinitas (Cardiff-by-the-Sea, Leucadia, Olivenhai...
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Reflecting Telescope: Encyclopedia Ii - Reflecting Telescope - Technical Considerations
The primary mirror is the reflector telescope's basic optical element and creates an image at the focal plane. The distance from the mirr...
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Reflecting Telescope: Encyclopedia Ii - Reflecting Telescope - Focal Planes
Reflecting telescope - Prime focus.
In a prime focus design, the observer sits inside the telescope, at the focal point of the reflecte...
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San Diego County California: Encyclopedia Ii - San Diego County California - Demographics
As of the census2 of 2000, there are 2,813,833 people, 994,677 households, and 663,449 families residing in the county. The population de...
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Mount Wilson Observatory: Encyclopedia Ii - Mount Wilson Observatory - 100 Inch 2.5 M Hooker Telescope
Hale immediately set about creating a larger telescope. John D. Hooker provided crucial funding for it, along with Carnegie. The Saint Go...
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Brown Dwarf: Encyclopedia Ii - Brown Dwarf - History
Brown dwarfs were originally called black dwarfs, a classification for dark substellar objects floating freely in space which were too lo...
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Brown Dwarf: Encyclopedia Ii - Brown Dwarf - In Practice
Typical atmospheres of known brown dwarfs range in temperature from 300 to over 3000 K, in comparison with stars, which cool to minimum t...
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90377 Sedna: Encyclopedia Ii - 90377 Sedna - Classification
The discoverers have argued that Sedna is actually the first observed body belonging to the Oort cloud, saying that it is too far out to ...
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90377 Sedna: Encyclopedia Ii - 90377 Sedna - Physical Characteristics
Sedna has an estimated diameter of between 1180 and 1800 kilometres (730 to 1120 miles). At the time of its discovery it was the largest ...
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1948: Encyclopedia Ii - 1948 - Births
1948 - January-February.
January 2 - Mary Archer, British scientist
January 2 - Deborah Watling, British actress
January 7 - Kenny Log...
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90377 Sedna: Encyclopedia Ii - 90377 Sedna - Orbital Characteristics
Sedna has a highly elliptical orbit, with its aphelion estimated at 942 AU and its perihelion at about 76.1 AU. At its discovery it was a...
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California Institute Of Technology: Encyclopedia Ii - California Institute Of Technology - Academics
Academics at Caltech are famously hard, and the analogy of drinking water from a firehose is often applied. Life is sometimes described b...
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California Institute Of Technology: Encyclopedia Ii - California Institute Of Technology - Student Life
California Institute of Technology - House system.
See main article: House System at Caltech
During the early 20th century, a Caltech c...
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Gamma Ray Burst: Encyclopedia Ii - Gamma Ray Burst - List Of Grbs
Gamma ray burst - Notable GRBs.
GRB 990123, in 1999, was the first seen in the optical waveband while bursting.
GRB 971214, in 1998, w...
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Gamma Ray Burst: Encyclopedia Ii - Gamma Ray Burst - Soft Gamma Repeater
A Soft gamma repeater is a type of magnetar which emits large bursts of gamma rays and X-rays at irregular intervals. The photons are les...
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Gamma Ray Burst: Encyclopedia Ii - Gamma Ray Burst - Mass Extinction On Earth
One line of research has investigated the consequences of Earth being hit by a beam of gamma rays from a nearby gamma ray burst. This is ...
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Gamma Ray Burst: Encyclopedia Ii - Gamma Ray Burst - Caught In The Act: Grb 990123
Astronomers first managed to obtain a visible-light image of a GRB as it occurred on January 23, 1999, using the Robotic Optical Transien...
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Gamma Ray Burst: Encyclopedia Ii - Gamma Ray Burst - Discovery
Cosmic gamma-ray bursts were discovered in the late 1960s by the US Vela nuclear test detection satellites. The Velas were built to detec...
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Gamma Ray Burst: Encyclopedia Ii - Gamma Ray Burst - Pinpointing A Burst: Grb 970228
By the late 1990s, the local origin hypothesis for GRBs had been ruled out. The first clue came from the Italian-Dutch BeppoSAX satellite...
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San Diego County California: Encyclopedia Ii - San Diego County California - Geography
According to the U.S. Census Bureau, the county has a total area of 11,721 km² (4,526 mi²). 10,878 km² (4,200 mi²) of it is land and ...
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Palomar Observatory: Encyclopedia Ii - Palomar Observatory - The Hale Telescope
This 200 inch (5.08 m) telescope is named after astronomer George Ellery Hale. It was built by a Caltech-Carnegie Institution consortium ...
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