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Topic: Sun

Related Topics

Solar system

Solar radius

Solar variation

Solar energy

Solar power

Sunspot

Corona

Skies of other planets

Spicule (solar physics)

Solar radiation

Solar flare

Heliostat

Active solar

Timeline of solar astronomy

	The Sun
		The Sun is personified in many mythologies: the Greeks called it Helios and the Romans called it Sol.
		The Sun's energy output (3.86e33 ergs/second or 386 billion billion megawatts) is produced by nuclear fusion reactions.
		The surface of the Sun, called the photosphere, is at a temperature of about 5800 K. Sunspots are "cool" regions, only 3800 K (they look dark only by comparison with the surrounding regions).
	www.nineplanets.org /sol.html (1435 words)

	Sun Microsystems - Sun Developer Network (SDN)
		Sun provides mission-critical deployment telephone support for enterprise customers running applications that use Sun Java runtime environments (JREs) in environments using Windows, Linux, or Solaris operating systems.
		Sun Studio software delivers high performance, optimizing C, C++, and Fortran compilers for the Solaris OS on SPARC, and both Solaris and Linux on x86/x64 platforms.
		With Sun certification, show that you have the competency, dedication, and thrust that add value in the highly competitive technology field.
	developers.sun.com (800 words)

	Sun
		The difference in mass is expelled as energy and is carried to the surface of the Sun, through a process known as convection, where it is released as light and heat.
		This sequence of images of the the Sun in ultraviolet light was taken by the Solar and Heliospheric Observatory (SOHO) spacecraft on February 11, 1996 from its unique vantage point at the "L1" gravity neutral point 1 million miles sunward from the Earth.
		This image of 1,500,000°C gas in the Sun's thin, outer atmosphere (corona) was taken March 13, 1996 by the Extreme Ultraviolet Imaging Telescope onboard the Solar and Heliospheric Observatory (SOHO) spacecraft.
	www.solarviews.com /eng/sun.htm (1247 words)

	Sun - MSN Encarta
		The Sun is an average star—its size, age, and temperature fall in about the middle of the ranges of these properties for all stars.
		The Sun is much closer to Earth than any other star is. The Sun’s nearest stellar neighbor, Proxima Centauri (part of the triple star Alpha Centauri), is 4.3 light-years from our solar system, meaning light from Proxima Centauri takes 4.3 years to reach the Sun.
		Within the heliosphere, the Sun provides most of the heat and light that are present, and the particles in the solar wind interact with the planets and satellites in the solar system.
	encarta.msn.com /encyclopedia_761562112/Sun.html (1256 words)

	Sun - Wikipedia, the free encyclopedia
		The Sun's radius is measured from its center to the edge of the photosphere.
		The optical surface of the Sun (the photosphere) is known to have a temperature of approximately 6,000 K.
		In 1890 Joseph Lockyer, the discoverer of helium in the solar spectrum, proposed a meteoritic hypothesis for the formation and evolution of the sun.
	en.wikipedia.org /wiki/Sun (6557 words)

	Sun Microsystems - Wikipedia, the free encyclopedia
		Sun Microsystems is headquartered in Santa Clara, California on the former west campus of the Agnews Developmental Center, which was an asylum from 1888 to 1972.
		Sun's brief first foray into x86 systems ended in the early 1990s, when it was decided to concentrate on SPARC and retire the last Motorola systems and 386i products (this move was dubbed by McNealy as "all the wood behind one arrowhead").
		Sun is most well known for its Unix systems, which have a reputation for system stability and a consistent design philosophy.
	en.wikipedia.org /wiki/Sun_Microsystems (2919 words)

	The Sun - Introduction
		This is remarkable given the size of the Sun, and represents such a huge change that we often think of it as a true boundary.
		The photosphere is slightly different from one place on the Sun to another, but in general is has a pressure about a few hundredths of the sea-level pressure on Earth, a density of about a ten-thousandth of the Earth's sea-level atmospheric density, and a temperature in the range 4500-6000 Kelvin.
		Because of this high temperature, the bulk of the radiation from the corona is emitted at ultraviolet and X-ray wavelengths.
	imagine.gsfc.nasa.gov /docs/science/know_l1/sun.html (970 words)

	StarDate Online \| Solar System Guide \| Sun
		The Sun was born about 4.6 billion years ago from the gravitational collapse of a vast cloud of gas and dust.
		The Sun's nuclear "furnace," where fusion reactions initially combine hydrogen atoms to produce helium, yielding energy in the process.
		The Sun's outer atmosphere, which is heated by the magnetic field to millions of degrees.
	stardate.org /resources/ssguide/sun.html (635 words)

	Sun Safety
		If your child is in the sun between these hours, as many kids are, be sure to apply protective sunscreen - even if he or she is just playing in the backyard.
		If your infant must be in the sun, dress him or her in clothing that covers the body, including hats with wide brims to shadow the face.
		By using a variety of sun protection measures, such as keeping your child indoors during peak hours and encouraging your child to wear hats, sunglasses, and long-sleeved shirts, as well as using sunscreen, you can decrease your child's exposure to the damaging effects of the sun.
	www.kidshealth.org /parent/firstaid_safe/outdoor/sun_safety.html (2384 words)

	Sun Alliance
		Sun's philosophy of sharing innovation and building communities is at the forefront of the next wave of computing: the Participation Age.
		Sun can be found in more than 100 countries and on the Web at http://sun.com.
		In addition, Sun is exploring ways to leverage technology developed in CSC's Centers of Excellence and is working closely with CSC in areas such as storage, consolidation, transformation, identity, and SOA.
	www.csc.com /alliancepartners/sun.shtml (412 words)

	Java Technology
		JavaOne, Sun's 2008 Worldwide Developer Conference, is seeking proposals for technical sessions and Birds-of-a-Feather (BOFs) sessions for this year's conference.
		Sun Microsystems, Inc., is announcing two new Java SE security response features, each designed to strengthen the Java platform's position as one of the most widely used, secure software platforms available.
		This latest release includes Sun Java System Application Server 9.1 FCS (GlassFish V2), which features clustering, centralized administration, and comprehensive web services management support.
	java.sun.com (393 words)

	Howstuffworks "How the Sun Works"
		The sun warms our planet every day, provides the light by which we see and is absolutely necessary for life on Earth.
		Officially, the sun is classified as a G2 type star based on its temperature and the wavelengths or spectrum of light that it emits.
		The sun is an "average" star, merely one of billions of stars that orbit the center of our galaxy.
	science.howstuffworks.com /sun.htm (378 words)

	The Sun - Zoom Astronomy
		The Earth is closest to the Sun (this is called perihelion) around January 2 each year (91.4 million miles = 147.1 million km); it is farthest away from the Sun (this is called aphelion) around July 2 each year (94.8 million miles = 152.6 million km).
		The composition of the Sun is studied using spectroscopy in which the visible light (the spectrum) of the Sun is studied.
		The outer regions of the Sun (the corona) are studied during solar eclipses.
	www.enchantedlearning.com /subjects/astronomy/sun (775 words)

	Jet Propulsion Laboratory: Sun
		Our Sun, the 5-billion-year-old star that sustains life here on Earth, powers photosynthesis in green plants and is ultimately the source of all food and fossil fuel.
		The connection and interaction between the Sun and Earth drive the seasons, currents in the oceans, weather and climate.
		Although its interior has been modified by nuclear reactions, the outer layers of the Sun are composed of very nearly the same material as the original solar nebula.
	www.jpl.nasa.gov /solar_system/sun/sun_index.html (240 words)

	SOHO
		The Sun is 150 million kilometers (93 million miles) away from the Earth (this distance varies slightly throughout the year, because the Earth's orbit is an ellipse and not a perfect circle).
		The Sun is mostly made up of hydrogen (about 92.1% of the number of atoms, 75% of the mass).
		All of the energy that we detect as light and heat originates in nuclear reactions deep inside the Sun's high-temperature "core." This core extends about one quarter of the way from the center of Sun to its surface where the temperature is around 15 million kelvin (K) (or 27 million degrees Fahrenheit (F)).
	sohowww.nascom.nasa.gov /explore/sun101.html (853 words)

	Vendor Rating: Sun
		Sun is targeting mainframe replacement and server consolidation, but MIPS comparisons aimed at showing the Sun Fire 15000's superiority to mainframes are not a valid comparison for diverse workloads.
		However, Sun's concession to introduce Linux as a native OS on Intel-compatible hardware means that the company has finally acknowledged that one-server strategy will not suit all market needs.
		However, should its enterprise server products lose their competitive edge or should Sun fail to reinvent the way in which it deals with its customers, suppliers and partners, it could be in risk of losing its market edge.
	www4.gartner.com /1_researchanalysis/vendor_rating/vr_sun.jsp (1817 words)

	BBC - Science & Nature - Space - The Sun
		The Sun is by far the brightest object in the sky.
		The Sun's energy output is estimated to be 386 billion, billion megawatts.
		A journey to the Sun itself would be impossible even for the best protected of ships due to the scorching temperatures.
	www.bbc.co.uk /science/space/solarsystem/sun/index.shtml (762 words)

	Jonathan Schwartz's Weblog : Weblog
		Sun believes that the twin goals of greater transparency and access to information for individual investors would be served by permitting web-based, real-time disclosures pursuant to the rules suggested above.
		Sun remains committed to working with the Commission on enlisting technology to the service of the American investor.
		ODF is a true open standard, adopted and implemented by a diversity of vendors (from IBM and Sun, to Google, Red Hat and now even Microsoft), and embraced by an amazing spectrum of the planet.
	blogs.sun.com /roller/page/jonathan (6268 words)

	NASA's Solar System Exploration: Planets: Sun: Overview (Site not responding. Last check: )
		Our solar system's star, the Sun, has inspired mythological stories in cultures around the world, including those of the ancient Egyptians, the Aztecs of M�xico, Native American tribes of North America and Canada, the Chinese, and many others.
		The Sun is the closest star to Earth, at a mean distance from our planet of 149.60 million kilometers (92.96 million miles).
		The connection and interactions between the Sun and Earth drive the seasons, ocean currents, weather, and climate.
	solarsystem.nasa.gov /planets/profile.cfm?Object=Sun (195 words)

	Sun
		The Sun is the closest star to Earth and is the center of our solar system.
		A giant, spinning ball of very hot gas, the Sun is fueled by nuclear fusion reactions.
		The Sun is also an active star that displays sunspots, solar flares, erupting prominences, and coronal mass ejections.
	www.windows.ucar.edu /tour/link=/sun/sun.html (117 words)

	Sun Information, The Sun, Sun Protection at SPACE.com
		Situated at the center of the solar system, the Sun is actually just a large star whose strong magnetic fields cause other solar matter, mainly planets, asteroids, comets, meteoroids and other debris, to orbit around it.
		The Sun is believed to be more than 4.6 billion years old, and is comprised of mostly hydrogen (74%) and helium (25%).
		The Sun is also directly responsible for determining and regulating the varying climates and weather cycles that occur on Earth.
	www.space.com /sun (401 words)

	APOD Index - Stars: Sun
		Astronomers are still working to understand, however, why so few neutrinos are measured from the Sun's core.
		This high-resolution picture also shows clearly that the Sun's face is a bubbling sea of separate cells of hot gas.
		Explanation: During a total solar eclipse, the Sun's extensive outer atmosphere or corona is an awesome and inspirational sight.
	antwrp.gsfc.nasa.gov /apod/sun.html (378 words)

	The Sun and Solar System - Third Step of the Virtual Tour
		Processing the data reveals the structure of the complicated magnetic fields on the visible surface of the Sun - contributing to research aimed at understanding the forces that drive the Sun - and their ultimate effects on Earth.
		Data are historical from 1749; the number of sunspots visible on the sun clearly waxes and wanes with an approximate 11-year cycle.
		SOHO is designed to study the internal structure of the Sun, its extensive outer atmosphere and the origin of the solar wind, the stream of highly ionized gas that blows continuously outward through the Solar System.
	science.nasa.gov /newhome/pad/sun_today.htm (422 words)

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