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Latest Photosphere Stories

Sun Surface Cooler Than Previously Thought
2013-02-04 19:27:46

Lee Rannals for redOrbit.com — Your Universe Online One who didn't know better would think that the closer you get to the sun, the warmer you are. However, it is actually the outer edge of the sun that you would find to be scorching, compared to the surface, and one study sought to find out why. Scientists from Northumbria University wrote in the journal Nature Communications that they used solar-imaging technology to observe the Sun's chromosphere, which is a region of the Sun's...

NASA Launching New Sun Observing Spacecraft Thursday
2012-07-04 13:04:55

Lee Rannals for redOrbit.com - Your Universe Online While the nation shoots off plenty of fireworks for the Fourth of July, NASA will be sending off its own rocket the next day. The space agency will be launching its Solar Ultraviolet Magnetograph Investigation (SUMI) on Thursday to study the magnetic fields on the sun. SUMI will set out to study the constantly changing magnetic fields in an area of the sun's low atmosphere called the chromosphere. These magnetic fields lie at the...

Ultrafine Loops In The Sun's Corona
2012-06-13 15:31:07

A key to understanding the dynamics of the sun and what causes the great solar explosions there relies on deciphering how material, heat and energy swirl across the sun's surface and rise into the upper atmosphere, or corona. Tracking the constantly moving material requires state-of-the-art telescopes with the highest resolution possible. By combining images from NASA's Solar Dynamics Observatory (SDO) and a new generation telescope called the New Solar Telescope (NST) at Big Bear Solar...

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2011-04-18 09:13:00

Researchers at the University of Central Lancashire have monitored the birth of a sunspot over a period of eight hours using observations from NASA's Solar Dynamics Observatory (SDO). Dr Stephane Regnier will present the results at the RAS National Astronomy Meeting in Llandudno on Monday 18th April. The emerging sunspot was first detectable at 17:00 UT on 30th May 2010 in SDO magnetograms, which map the magnetic intensity of the solar disc. The first signs were small patches of strong...

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2010-11-19 07:20:00

By Karen C. Fox, NASA's Goddard Space Flight Center Solar flares "“ they're big and they're fast. They can knock out a satellite or create a beautiful aurora. And the jury is still out on what causes these explosions. Flares, and the related coronal mass ejection, shoot energy, radiation, and magnetic fields out into space that can harm satellites or humans in space. Current observations aren't precise enough to determine whether the eruptions are driven by energy surging through the...

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2010-10-01 09:10:00

The sun is a very noisy place, generating an inferred multi-frequency song comparable to cathedral bells To most of us, the sun seems to dangle in space silently without making so much as a peep. Nevertheless, "the sun is a very noisy place," said Scott McIntosh of the National Science Foundation (NSF)-supported National Center for Atmospheric Research. What does the sun sound like? As best as we can tell, the sun sounds like a low hum punctuated by frequent rhythmic, bass-y thumps. How does...

2009-03-25 11:51:37

U.K. scientists say they have solved one of the most puzzling features of the sun: why its outside atmosphere is hotter than its inner photosphere. Researchers from Belfast's Queen's University and Britain's University of Sheffield said the surface of the sun, known as the photosphere, reaches temperatures of 5,000 degrees Celsius, while its outer atmosphere, known as the corona, can reach temperatures of more than 1 million degrees Celsius. The scientists discovered evidence for the...

2008-08-04 12:00:44

THE vastness of York Minster has been captured on film using a pioneering photo-montage process which aims to provide visitors with a new perspective on the magnificent building. Conventional photography of the interior can only convey its beauty in rectangular frames. But artist Edward Hill has spent years developing a technique which allows him to assemble a mosaic of pictures and then spin them into a circle using a computer. Although the montages are displayed as 2-D prints on...

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2007-05-29 16:35:00

Research explains century-old mystery about the interior of the sun Sound waves escaping the sun's interior create fountains of hot gas that shape and power a thin region of the sun's atmosphere which appears as a ruby red "ring of fire" around the moon during a total solar eclipse, according to research funded by the National Science Foundation (NSF) and NASA. The results are presented today at the American Astronomical Society's Solar Physics Division meeting in Hawaii. This region, called...

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2006-12-23 10:40:45

WASHINGTON - Instruments aboard a Japan Aerospace Exploration Agency satellite named Hinode, or "Sunrise," are returning extraordinary new images of our sun. The international mission to study the forces that drive the violent, explosive power of the sun launched from Japan in September. Hinode is circling Earth in a polar flight path (a "sun-synchronous" orbit) that allows the spacecraft's instruments to remain in continuous sunlight for nine months each year. An international team of...


Latest Photosphere Reference Libraries

6_b41df2b5116346e900bfb8a97da136be2
2004-10-19 04:45:42

Photosphere -- The photosphere of an astronomical object is the region at which the optical depth becomes one. In other words, the photosphere is the place where an object stops being transparent. It is typically used to describe the Sun or another star. Because stars are large balls of gas, they have no solid surface. However, there is a depth at which the gas stops being transparent to photons, and this depth provides a visual surface to the star. The Sun's photosphere has a...

6_9f9676753bcc717a861f93bfceb7d2f82
2004-10-19 04:45:41

Corona -- The corona is the luminous "atmosphere" of the Sun extending millions of kilometers into space, most easily seen during a total solar eclipse. An interesting feature of the corona is the fact that it is much hotter than the visible "surface" of the Sun; the photosphere is approximately 6000°C compared to the corona at over one million °C. The corona is much less dense than the photosphere, however, and so produces less light. The exact mechanism by which the corona is...

6_4d16b7c37ad5d88de63c76846431dbc72
2004-10-19 04:45:41

Chromosphere -- The chromosphere (literally, "color sphere") is a thin layer of the Sun's atmosphere just above the photosphere, roughly 10,000 kilometers deep. The chromosphere is more visually transparent than the photosphere. The most common solar feature within the chromosphere are spicules, long thin fingers of luminous gas which appear like the blades of a huge field of fiery grass growing upwards from the photosphere below. Spicules rise to the top of the chromosphere and then sink...

4_c3e26bdabe1325e08e2593b25329604b2
2004-10-19 04:45:41

Solar Flare -- A solar flare is a violent eruption that explodes from a star's photosphere with energies equivalent to tens of millions of hydrogen bombs. Solar flares from the Sun send out a streams of highly energetic solar wind that can present a radiation hazard to spacecraft outside of planetary magnetospheres and can disrupt radio signals on Earth. Solar flares were first observed on the Sun in 1859 by English astronomer Richard Carrington. They have also been observed to...

4_a9775d2328a386c7976f6f9895c6d2ac2
2004-10-19 04:45:40

The Sun -- intensely hot, self-luminous body of gases at the center of the solar system. Its gravitational attraction maintains the planets, comets, and other bodies of the solar system in their orbits. The sun is actually a star of about medium size; it appears larger than the other stars because of its relative nearness to the earth. The earth's distance from the sun varies from 91,377,000 mi (147,053,000 km) at perihelion to 94,537,000 mi (152,138,000 km) at aphelion (see apsis). The...

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Word of the Day
tesla
  • The unit of magnetic flux density in the International System of Units, equal to the magnitude of the magnetic field vector necessary to produce a force of one newton on a charge of one coulomb moving perpendicular to the direction of the magnetic field vector with a velocity of one meter per second. It is equivalent to one weber per square meter.
This word is named for Nikola Tesla, the inventor, engineer, and futurist.