Gourt > Computers > Hardware > Systems > Sun
| Observation data | |
|---|---|
| Mean distance from Earth | 149.6 km (92.95 mi) (8.31 minutes at the speed of light) |
| Visual brightness (V) | −26.8m |
| Absolute magnitude | 4.8m |
| Spectral classification | G2V |
| Orbital characteristics | |
| Mean distance from Milky Way core | ~2.5 km (26,000-28,000 light-years) |
| Galactic period | 2.25-2.50 a |
| Velocity | 217 km/s orbit around the center of the Galaxy, 20 km/s relative to average velocity of other stars in stellar neighborhood |
| Physical characteristics | |
| Mean diameter | 1.392 km (109 Earth diameters) |
| Circumference | 4.373 km (342 Earth diameters) |
| Oblateness | 9 |
| Surface area | 6.09 km² (11,900 Earths) |
| Volume | 1.41 km³ (1,300,000 Earths) |
| Mass | 1.9891 kg | (332,950 Earths)
| Density | 1.408 g/cm³ |
| Surface gravity | 273.95 m s-2 | (27.9 g)
| Escape velocity from the surface | 617.54 km/s |
| Surface temperature | 5780 K |
| Temperature of corona | 5 MK |
| Core temperature | ~13.6 MK |
| Luminosity (Lsol) | 3.827 W 3.9 lm or 100 lm/W efficacy |
| Mean Intensity (Isol) | 2.009 W m-2 sr-1 |
| Rotation characteristics | |
| Obliquity | 7.25° (to the ecliptic) 67.23° (to the galactic plane) |
| Right ascension of North pole | 286.13° (19 h 4 min 30 s) |
| Declination of North pole | +63.87° (63°52' North) |
| Rotation period at equator | 25.3800 days (25 d 9 h 7 min 13 s) |
| Rotation velocity at equator | 7174 km/h |
| Photospheric composition (by mass) | |
| Hydrogen | 73.46 % |
| Helium | 24.85 % |
| Oxygen | 0.77 % |
| Carbon | 0.29 % |
| Iron | 0.16 % |
| Neon | 0.12 % |
| Nitrogen | 0.09 % |
| Silicon | 0.07 % |
| Magnesium | 0.05 % |
| Sulphur | 0.04 % |
About 74% of the Sun's mass is hydrogen, 25% is helium, and the rest is made up of trace quantities of heavier elements. The Sun is about 4.6 billion years old and is about halfway through its main-sequence evolution, during which nuclear fusion reactions in its core fuse hydrogen into helium. Each second, more than 4 million tonnes of matter are converted into energy within the Sun's core, producing neutrinos and solar radiation. In about 5 billion years, the Sun will evolve into a red giant and then a white dwarf, creating a planetary nebula in the process.
The Sun is a magnetically active star; it supports a strong, changing magnetic field that varies year-to-year and reverses direction about every eleven years. The Sun's magnetic field gives rise to many effects that are collectively called solar activity, including sunspots on the surface of the Sun, solar flares, and variations in the solar wind that carry material through the solar system. The effects of solar activity on Earth include auroras at moderate to high latitudes, and the disruption of radio communications and electric power. Solar activity is thought to have played a large role in the formation and evolution of the solar system, and strongly affects the structure of Earth's outer atmosphere.
More on [ Sun ]
tc-cal-main: Major alarm Resource: CPU CPU usage has exceeded 90% (100%) Time: Sun, Dec 20 2009, 17:12
jeffbourassa (Jeff Bourassa) Mon, 21 Dec 2009 01:03:41 -0000
tc-cal-main: Major alarm Resource: CPU CPU usage has exceeded 90% (100%) Time: Sun, Dec 20 2009, 17:12
FTW? Doesn't the ice-cream truck man know its freezing cold outside and no sun?
Marsmellowgurl (Marsmellowgurl) Mon, 21 Dec 2009 00:43:40 -0000
FTW? Doesn't the ice-cream truck man know its freezing cold outside and no sun?
listen to Empire Of The Sun - Walking On A Dream on @hypem http://awe.sm/28MPp
garrettkocher (garrett Kocher) Mon, 21 Dec 2009 00:42:38 -0000
listen to Empire Of The Sun - Walking On A Dream on @hypem http://awe.sm/28MPp
General Discussion :: RE: Throwback type Dr Pepper in January: Author: snappyjack Posted: Sun Dec 20, 2009 6:21 pm... http://bit.ly/4X9bCC
salutetosoda (Salute To Soda) Mon, 21 Dec 2009 00:33:55 -0000
General Discussion :: RE: Throwback type Dr Pepper in January: Author: snappyjack Posted: Sun Dec 20, 2009 6:21 pm... http://bit.ly/4X9bCC
Hello sun, daddy is back!
siwat (Siwat Chawareewong) Mon, 21 Dec 2009 00:33:55 -0000
Hello sun, daddy is back!
Jetzt laeuft: Turn off the sun von Vygors
dasinselradio (Das Inselradio 95,8) Mon, 21 Dec 2009 00:25:23 -0000
Jetzt laeuft: Turn off the sun von Vygors
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18 James Utilities - Source code of utilities used at 18 James, developed for a local network of Sun workstations.
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A3Net.com - Sells refurbished Sun Microsystems products, featuring servers, memory, adapters, monitors, and storage. Online shopping is available.
Acardia - Sun Microsystems reseller dedicated to the developer community, based in Bracknell, Berks, UK. Provides suggested startup packages and links to the SDC Programme.
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Aeco Pacific's NovaStore - An Australian supplier of Sun Microsystems equipment, featuring online e-commerce configuration and order fulfillment.
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Ajava - Resellers of servers, workstations, parts and peripherals of Sun and UNIX based systems.
AllSunPlus.com - Retailers/resellers of new and used Sun Microsystems workstations, servers, parts, and peripherals.
AnySystem.com - Sells a selection of refurbished Sun Microsystems products including UltraSparc workstations, SparcStations, and Enterprise servers, monitors, adapters, storage, and parts.
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Applied Computer Systems - Specializes in SPARC workstations, Enterprise servers and parts, new used and refurbished, sales and service.
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b2net - A Sun Solution Reseller for datacenter, enterprise and workgroup solutions, b2net supplies Unix and network hardware.
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Business Systems International Ltd - Supplier of Sun systems, specialist peripherals and Solaris software, as well as Oracle and Veritas.
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404
Buy Sun Online / Q Associates - An authorised online store for Sun Microsystems equipment from Q Associates, a reseller in the UK.
Meta Description: [ www.buy-sun-online.com is the UKs leading authorised online Sun Microsystems store from Q Associates , one of the Uks leading Sun Resellers ]
Carlo Gavazzi Computing Solutions - Designs and manufactures a wide range of multiport synchronous and asynchronous multiport serial controllers for Sun Solaris.
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500
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Cobalt Support - Provides a full range of services for the Cobalt RaQ, including comprehensive security consultation.
Meta Description: [ Cobalt Support - The best website to ensure you keep your Cobalt RaQ and BlueQuartz (Blue Quartz) servers working to their maximum potential. ]
Computer Connection of Central New York - CCNY - New and refurbished Sun and compatible workstations and servers, offering trade-in programs and over 15 years experience in sales and service for Sun. ISO 9002 quality.
Meta Description: [ Refurbished IT hardware from tio names like Sun Microsystems, Cisco, and Fortinet. ]
Coolspirit - Provides SharkRack, designed in conjunction with Sun Microsystems for Sun servers to cool and protect.
Meta Description: [ SharkRack - Rack Mount Solutions for Sun Servers ]
Corporate Technologies, Inc. - A US-based partner of Sun providing IT solutions design, development, hardware and software. Lists resources, news, and contact information.
Data Master International - Manufactures and markets Sun Microelectronics SPARC based computing systems.
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Datalease Inc. - Reseller of refurbished and off lease Sun servers and workstations, Cisco systems routers, switches and network hardware.
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Distributor Systems International, Ltd. - Authorised reseller based just outside southeast London (UK). Sells new, used and remanufactured equipment ranging from SunRays to the most current server models.
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500
EOS Systems Integrator - Specializes in Sun systems, storage, networking, system management, databases and integration in UNIX.
Express Computer Systems - Provides refurbished Sun Microsystems, used Cisco, IBM xseries and pseries servers, HP 9000 servers, and NetApp hardware. Offers short term rentals and leases as well.
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G-2 Systems - Independent reseller of refurbished Sun Microsystems hardware and peripherals. Lists current special pricing on workstations, servers, storage and upgrades.
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GetITnew.com - Offers equipement from Sun Microsystems and routing gear from Nortel and Cisco.
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GovStor, LLC - Serves State of California accounts by offering the full Sun Microsystems line under CMAS contract as well as StorageTek, Veritas Software and Extreme Networks.
Meta Description: [ Systems, Storage and Networking ]
500
GSH Intelligent Integrated Systems - Source for Sun equipment and solutions, and provides online catalogs, specials, leasing information and support.
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Hart Communications - An independent distributor of Sun equipment, offering next-day delivery throughout Europe and second sourcing of end-of-life products.
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Livewire Computer Solutions - Canadian resellers of Sun Microsystems hardware and solutions including products from workstations to Enterprise Class servers and storage.
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Manucomp - Resellers of Sun Microsystems hardware and solutions including products from workstations to Enterprise Class servers and storage.
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OSIAH - Online Sun Information ArcHive - A collection of information and pictures relating to hardware and software from Sun Microsystems and friends.
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Sunrise Computer Services Ltd. - Offers desktop and rack-mounted systems up to quad-processor enterprise class servers, with peripherals including disk, tape backup, optical, and ultra-wide SCSI RAID, fibre RAID and LVD RAID configurations.
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SunSolve Online - Sun's informational and patch database service, with a browsable directory listing of all publicly available Sun Microsystems support documents.
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Sunware Catalog - For clothes, gifts and promotional products featuring Sun Logos and messages.
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Tadpole - A Sun Partner fully empowered source for hardware, software and system integration services associated with Sun OEM solutions, featuring Solaris-enabled notebooks. Lists news and events, promotions and user stories and reviews.
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Ultra Spec Cables, Inc. - Manufacturers of computer cables, devices, and accessories. Includes an online catalog. A designated Sun Strategic Developer.
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Useful tools for Sun workstations and Solaris - A collection of links and other informational resources related to Sun products and how they may be managed.
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Virtual Technology, Inc. - Specializes in the sale, lease or rental of Sun computer equipment.
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Xoptions.com - An independent Sun Microsystems distributor specialising in x-options, offering fast delivery from stock into the UK and EU.
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