Ranked #1
Sunspot
Sunspot
Transcript: Sunspots have been carefully observed for over four hundred years since the invention of the telescope. Thi... Read more
24 Jul 2011
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1min
Ranked #2
Solar Wind
Solar Wind
Transcript: The diffuse solar corona expands rapidly into deep space, and charged particles are blasted out from the sit... Read more
24 Jul 2011
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Ranked #3
Solar Chromosphere
Solar Chromosphere
Transcript: The visible surface and edge of the Sun and the region where sunspots lie is the Sun’s photosphere. Just ab... Read more
24 Jul 2011
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Ranked #4
Photosphere
Photosphere
The Sun is a smooth and continuously varying ball of gas which reduces in density moving outward until it gradually fade... Read more
24 Jul 2011
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1min
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The Solar Cycle
The Solar Cycle
Transcript: In 1830 the German astronomer Heinrich Schwabe started observing sunspots as a hobby. He was an amateur ast... Read more
24 Jul 2011
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Ranked #6
Sun Spots
Sun Spots
Transcript: Galileo was the first to show that sunspots are surface features on the Sun carried around by its rotation. ... Read more
24 Jul 2011
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Ranked #7
Solar Oscillations
Solar Oscillations
Transcript: The Sun oscillates or vibrates at many frequencies like a bell. Solar oscillations can be used to study the... Read more
24 Jul 2011
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1min
Ranked #8
Radiation and Convection
Radiation and Convection
Transcript: Energy produced in the core of the Sun travels out using two of the three basic modes of heat transport. He... Read more
24 Jul 2011
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Ranked #9
Standard Solar Model
Standard Solar Model
Transcript: Knowing the size, composition, and energy source of the Sun, astronomers can calculate the physical conditio... Read more
24 Jul 2011
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Ranked #10
Solar Neutrinos
Solar Neutrinos
Transcript: At the first step in the proton-proton chain in the Sun and other low mass stars neutrinos are produced. Si... Read more
24 Jul 2011
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Ranked #11
Neutrinos
Neutrinos
Transcript: Neutrinos were predicted as a consequence of the conservation of energy. This fundamental principle applies... Read more
24 Jul 2011
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1min
Ranked #12
Positron
Positron
Transcript: The positron is the antiparticle of the electron. Every particle in the zoo of nature has an antiparticle. ... Read more
24 Jul 2011
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Ranked #13
The Proton-Proton Chain
The Proton-Proton Chain
Transcript: The energy source of the Sun is the conversion by fusion of hydrogen into helium in a three step process cal... Read more
24 Jul 2011
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1min
Ranked #14
Fusion in the Sun
Fusion in the Sun
Transcript: The Sun is not burning in a conventional sense. In 1871 Hermann von Helmholtz calculated that if the Sun we... Read more
24 Jul 2011
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1min
Ranked #15
Fission as an Energy Source
Fission as an Energy Source
Transcript: Fission is such an efficient energy source that humans have long tried to harness it. A massive atomic nucl... Read more
24 Jul 2011
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1min
