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Palomar Observatory | A Wisdom Archive on Palomar Observatory | | Palomar Observatory A selection of articles related to Palomar Observatory | |
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Palomar Observatory
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| ARTICLES RELATED TO Palomar Observatory | | | |  Palomar Observatory: 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-mass stars. Stars, which achieve the high temperature necessary for fusing hydrogen, rapidly deplete their lithium. This occurs by a collision of Lithium-7 and a proton producing two Helium-4 nuclei. The temperature necessary for this reaction is just below the temperature necessary for hydrogen fusion. Convection in stars ensures that lithium in the whole volume of the sta ...
See also:Brown dwarf, Brown dwarf - History, Brown dwarf - In theory, Brown dwarf - Distinguishing heavy brown dwarfs from light stars, Brown dwarf - Distinguishing light brown dwarfs from large planets, Brown dwarf - In practice, Brown dwarf - Observational techniques, Brown dwarf - Milestones, Brown dwarf - Recent developments Read more here: » Brown dwarf: Encyclopedia II - Brown dwarf - In theory |
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| | | | | Palomar Observatory: 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, if the focal ratio is f/8 or longer a spherical primary mirror is sufficient for high visual resolution. A flat secondary mirror reflects the light to a focal plane at the side of the top of the telescope tube. It is one of the simplest and least expensive designs for a given size of primary, and is popular with amateurs as a home-build project. Since the light path is un ...
See also:Reflecting telescope, Reflecting telescope - Technical considerations, Reflecting telescope - Reflecting telescope designs, Reflecting telescope - Newtonian focus, Reflecting telescope - Cassegrain focus, Reflecting telescope - Schmidt camera, Reflecting telescope - Focal planes, Reflecting telescope - Prime focus, Reflecting telescope - Coudé focus Read more here: » Reflecting telescope: Encyclopedia II - Reflecting telescope - Reflecting telescope designs |
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| | | | | | | | | Palomar Observatory: 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 the focal point of the reflected light. In the past this would be the astronomer himself, but nowadays CCD cameras are used.
Radio telescopes often have a prime focus design. The mirror is replaced by a metal surface for reflecting radio waves, and the observer is an antenna.
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See also:Reflecting telescope, Reflecting telescope - Technical considerations, Reflecting telescope - Reflecting telescope designs, Reflecting telescope - Newtonian focus, Reflecting telescope - Cassegrain focus, Reflecting telescope - Schmidt camera, Reflecting telescope - Focal planes, Reflecting telescope - Prime focus, Reflecting telescope - Coudé focus Read more here: » Reflecting telescope: Encyclopedia II - Reflecting telescope - Focal planes |
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| | | | | Palomar Observatory: 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)
Palomar Observatory - owned and primarily operated by California Institute of Technology (CalTech)
San Diego County California - Wine regions.
the Ramona Valley wine-producing ...
See also:San Diego County California, San Diego County California - History, San Diego County California - Geography, San Diego County California - Adjacent Counties, San Diego County California - Sites of interest, San Diego County California - Observatories, San Diego County California - Wine regions, San Diego County California - Politics, San Diego County California - Demographics, San Diego County California - Current estimates, San Diego County California - Cities and towns in San Diego County, San Diego County California - Airports Read more here: » San Diego County California: Encyclopedia II - San Diego County California - Sites of interest |
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| | | | | Palomar Observatory: 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, Olivenhain)
Escondido
Imperial Beach
La Mesa
Lemon Grove
National City
Poway
Oceanside
San Diego
San Marcos
Santee
Solana Beach
Vista
Unincorporated Communities
Agua Caliente Springs
Alpine< ...
See also:San Diego County California, San Diego County California - History, San Diego County California - Geography, San Diego County California - Adjacent Counties, San Diego County California - Sites of interest, San Diego County California - Observatories, San Diego County California - Wine regions, San Diego County California - Politics, San Diego County California - Demographics, San Diego County California - Current estimates, San Diego County California - Cities and towns in San Diego County, San Diego County California - Airports Read more here: » San Diego County California: Encyclopedia II - San Diego County California - Cities and towns in San Diego County |
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| | | | | | Palomar Observatory: 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 reflected light. In the past this would be the astronomer himself, but nowadays CCD cameras are used.
Radio telescopes often have a prime focus design. The mirror is replaced by a metal surface for reflecting radio waves, and the observer is an antenna.
...
See also:Reflecting telescope, Reflecting telescope - Technical considerations, Reflecting telescope - Reflecting telescope designs, Reflecting telescope - Schmidt camera, Reflecting telescope - Newtonian focus, Reflecting telescope - Cassegrain focus, Reflecting telescope - Focal planes, Reflecting telescope - Prime focus, Reflecting telescope - Coudé focus Read more here: » Reflecting telescope: Encyclopedia II - Reflecting telescope - Focal planes |
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| | | | | Palomar Observatory: 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 density is 259/km² (670/mi²). There are 1,040,149 housing units at an average density of 96/km² (248/mi²). The racial makeup of the county is 66.52% White, 5.74% Black or African American, 0.86% Native American, 8.88% Asian, 0.48% Pacific Islander, 12.82% from other races, and 4.69% from two or more races. ...
See also:San Diego County California, San Diego County California - History, San Diego County California - Geography, San Diego County California - Adjacent Counties, San Diego County California - Sites of interest, San Diego County California - Observatories, San Diego County California - Wine regions, San Diego County California - Politics, San Diego County California - Demographics, San Diego County California - Current estimates, San Diego County California - Cities and towns in San Diego County, San Diego County California - Airports Read more here: » San Diego County California: Encyclopedia II - San Diego County California - Demographics |
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| | | | | Palomar 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 Gobain factory was again chosen to cast a blank in 1906, which it completed in 1908, After considerable trouble over the blank (and potential replacements), the 100 inch (2.5 m) telescope was completed and saw "first light" on November 1, 1917.
The mechanism incorporates a mercury float to provide smooth operation. The Hooker telescope was equipped in 1919 with a special attachment, an optical interfer ...
See also:Mount Wilson Observatory, Mount Wilson Observatory - 60 inch 1.5 m Hale telescope, Mount Wilson Observatory - 100 inch 2.5 m Hooker telescope, Mount Wilson Observatory - Solar telescopes, Mount Wilson Observatory - Interferometry Read more here: » Mount Wilson Observatory: Encyclopedia II - Mount Wilson Observatory - 100 inch 2.5 m Hooker telescope |
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| | | | | Palomar Observatory: 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 low in mass to sustain stable hydrogen fusion (black dwarfs currently refer to something different).
Early stellar models suggested that a true star requires a mass at least 80 times that of Jupiter to support such fusion. Dense star-like objects with smaller masses, or "brown dwarfs," were hypothesized by the early 1960s -- formed much the way stars are formed, they would however be hard to fin ...
See also:Brown dwarf, Brown dwarf - History, Brown dwarf - In theory, Brown dwarf - Distinguishing heavy brown dwarfs from light stars, Brown dwarf - Distinguishing light brown dwarfs from large planets, Brown dwarf - In practice, Brown dwarf - Observational techniques, Brown dwarf - Milestones, Brown dwarf - Recent developments Read more here: » Brown dwarf: Encyclopedia II - Brown dwarf - History |
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| | | | | Palomar Observatory: 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 temperatures of around 4000 K. Compared to stars, which warm themselves with steady internal fusion, brown dwarfs cool quickly over time; more massive dwarfs cool slower than less massive ones.
Brown dwarf - Observational techniques.
Coronographs have recently been used to detect faint objects orbiting bright visible stars, including Gliese 229B.
Sensitive ...
See also:Brown dwarf, Brown dwarf - History, Brown dwarf - In theory, Brown dwarf - Distinguishing heavy brown dwarfs from light stars, Brown dwarf - Distinguishing light brown dwarfs from large planets, Brown dwarf - In practice, Brown dwarf - Observational techniques, Brown dwarf - Milestones, Brown dwarf - Recent developments Read more here: » Brown dwarf: Encyclopedia II - Brown dwarf - In practice |
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| | | | | | | Palomar Observatory: Encyclopedia II - 1948 - Births
1948 - January-February.
January 2 - Mary Archer, British scientist
January 2 - Deborah Watling, British actress
January 7 - Kenny Loggins, American singer
January 10 - Donald Fagen, American keyboardist
January 10 - Mischa Maisky, Latvian cellist
January 14 - Carl Weathers, American football player and actor
January 14 - T-Bone Burnett, American record producer and musician
January 15 - Ronnie Van Zant, American musician (d. 1977)
Janu ...
See also:1948, 1948 - Events, 1948 - January-February, 1948 - March-April, 1948 - May, 1948 - June-July, 1948 - August-December, 1948 - Undated, 1948 - Unknown date, 1948 - Births, 1948 - January-February, 1948 - March-April, 1948 - May-July, 1948 - August-December, 1948 - Unknown date, 1948 - Deaths, 1948 - Nobel Prizes Read more here: » 1948: Encyclopedia II - 1948 - Births |
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| | | | | | Palomar Observatory: 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 by the aphorism, "Work, sleep, social life: pick two," pointing to the great amount of academic work. While Caltech is most famous for its physics department, under the leadership of David Baltimore, it has strived particularly to improve its facilities in the life sciences. Caltech is also known for interdisciplinary programs such as the Computation and Neural Systems (CNS) program.
C ...
See also:California Institute of Technology, California Institute of Technology - History, California Institute of Technology - Academics, California Institute of Technology - Academic departments, California Institute of Technology - Undergraduate program, California Institute of Technology - Student life, California Institute of Technology - House system, California Institute of Technology - Traditions Read more here: » California Institute of Technology: Encyclopedia II - California Institute of Technology - Academics |
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| | | | | Palomar Observatory: 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 committee visited several universities and decided to transform the undergraduate housing system from regular fraternities to a House System, similar to the residential college system of Oxford and Cambridge. Four (south) houses (or hovses, so named for the inscription on the gates thereof) were built: Blacker House, Dabney House, Fleming House, and Ricketts Ho ...
See also:California Institute of Technology, California Institute of Technology - History, California Institute of Technology - Academics, California Institute of Technology - Academic departments, California Institute of Technology - Undergraduate program, California Institute of Technology - Student life, California Institute of Technology - House system, California Institute of Technology - Traditions Read more here: » California Institute of Technology: Encyclopedia II - California Institute of Technology - Student life |
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