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TOPIC: The Sun
Blobrana


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RE: The Sun
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NASA's Solar Dynamics Observatory Catches "Surfer" Waves on the Sun

Cue the surfing music. Scientists have spotted the iconic surfer's wave rolling through the atmosphere of the sun. This makes for more than just a nice photo-op: the waves hold clues as to how energy moves through that atmosphere, known as the corona.
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Blobrana


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The Many Colours of the Sun

W. Dean Pesnell of the NASA Solar Dynamics Observatory presents an illustrated lecture on new observations and views of solar phenomena.

Speaker Biography: W. Dean Pesnell has published 80 papers in several research areas, including variable stars, the sun-earth connection, quantum mechanics and meteors in planetary atmospheres. He received his doctorate in 1983 from the University of Florida. After postdoctoral study at the University of Colorado and a visiting professorship at New Mexico State University, Pesnell came to NASA Goddard as a contractor in 1990. One project was to design the Living With a Star geospace missions. He started work on NASA's Solar Dynamics Observatory mission in 2004 and became the project scientist in 2005.



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Blobrana


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Faint young Sun paradox
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Title: Faint young Sun paradox remains
Authors: Colin Goldlatt, Kevin J. Zahnle

The Sun was fainter when the Earth was young, but the climate was generally at least as warm as today; this is known as the 'faint young Sun paradox'. Rosing et al. [1] claim that the paradox can be resolved by making the early Earth's clouds and surface less reflective. We show that, even with the strongest plausible assumptions, reducing cloud and surface albedos falls short by a factor of two of resolving the paradox. A temperate Archean climate cannot be reconciled with the low level of CO2 suggested by Rosing et al. [1]; a stronger greenhouse effect is needed.

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Blobrana


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Nasa images of Sun

Nasa is working with the University of Central Lancashire (UCLan) to unravel the mysteries of the Sun in unprecedented detail by watching its magnetic field and corona
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Blobrana


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Attack of the Sun



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Blobrana


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The Sun.



A light hearted look at the Sun.

Listen out for....
The fast show
Patrick Moore
Tomorrows World
David Attenborough
Wickers world
Horizon
Monty python
Tellytubbies
Jackanory
thunderbirds
Blue peter
The two Ronnies
Dr who
The magic roundabout
Morecambe and Wise show



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Blobrana


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First Photo of the Sun

Taking advantage of a relatively new technology, the daguerreotype, French physicists Louis Fizeau and Leon Foucault made the first successful photographs of the sun on April 2, 1845.
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Blobrana


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Researchers Crack the Mystery of the Missing Sunspots

In 2008-2009, sunspots almost completely disappeared for two years. Solar activity dropped to hundred-year lows;  Earth's upper atmosphere cooled and collapsed; the sun's magnetic field weakened, allowing cosmic rays to penetrate the Solar System in record numbers. It was a big event, and solar physicists openly wondered, where have all the sunspots gone?
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Blobrana


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Spicules
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Jets implicated in solar riddle

Scientists say they are closer to understanding why the Sun's outer atmosphere is hotter than its surface.
The corona, as it is known, is millions of degrees hotter than the star's visible surface layer, or photosphere.
Two satellites have now identified jets of super-heated gas, called spicules, shooting up from just above the Sun's surface into the outer atmosphere.
Researchers tell the journal Science that this process could be what maintains the temperature difference.
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Blobrana


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Sun's corona
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Plasma jets key to enduring solar mystery

It's been a mystery for more than half a century: why, in the short distance from the Sun's surface to its corona, or outer atmosphere, does the temperature leap from a few thousand to a few million degrees? The answer, researchers say, might lie in hot jets of plasma erupting from the Sun's surface.



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