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Transcript
The Sun Our Very Own Star Copy this URL into your browser http://www.esa.int/esaSC/SEM4SB4XQEF_index_1.html Assembled By Ken Mitchell Livermore TOPScience dtd; 3/15/09 Earth’s Four Seasons SOHO's Uninterrupted View of the Sun Solar Prominence from SOHO See Notes HR Diagram - Star Sequence Cutaway of Our Only Thermonuclear Power Plant Cutaway Diagram of the Sun See Notes Sunspots From Hinode’s Optical Telescope See Notes The biggest of the new-cycle spots emerged at the end of the month on Halloween (2008). Numbered 1007, or "double-oh seven" for short, the sunspot had two dark cores each wider than Earth connected by active magnetic filaments thousands of kilometers long. See Notes. Twisted Solar Eruptive Prominence See Notes Small prominences extend from the chromosphere up into the lower corona. See Notes SOHO Best Sun Photo Solar Prominence Extending Millions of Miles from the Sun's Surface See Notes A Solar Prominence from SOHO Sunspot Loops in Ultraviolet Heavy Ultraviolet Filtering Darkens Inactive Regions of the Sun Dark See SunNotes Sizzling The Sun’s Corona See Notes The Solar Spectrum See Notes Solar System Raising Over Fire Island See explanation on next slide Solar System Rising Over Fire Island Explanation: If you wait long enough, the entire Solar System will rise before you. To see such a sight, however, you will need to look in the direction of the ecliptic. All of the planets and their moons orbit the Sun in nearly the same plane, the ecliptic plane. From the Earth, this means that each day they will all rise in nearly the same direction - and later set in the opposite direction. Ten years ago, a series of time exposures caught, left to right, the Sun, Venus, the Moon, and Jupiter, all rising in the ecliptic plane behind Fire Island, New York, USA. Exposures were taken every six minutes and digitally superposed on an image taken from the same location at sunrise. Smaller members of our Solar System, including most comets and many asteroids, do not always move along the ecliptic plane. The picturesque Fire Island Lighthouse, visible in the foreground, was built in 1826 and is still in use today. Ulysses Solar Orbit of the Sun -- (Solar Polar Flyby?) Red dots denote 10 or more flares in a month. Yellow dots 3 to 9 flares. Green dots 1 or 2 flares. Frequency of X-flares during the last three solar cycles The Sun’s Solar Activity Cycle Solar Cycle 23 is coming to an end The longest minimum on record, the Maunder Minimum of 1645-1715, lasted an incredible 70 years. Sunspots were rarely observed and the solar cycle seemed to have broken down completely. The period of quiet coincided with the Little Ice Age, a series of extraordinarily bitter winters in Earth's northern hemisphere. Many researchers are convinced that low solar activity, acting in concert with increased volcanism and possible changes in ocean current patterns, played a role in that 17th century cooling. See Notes. Analemma and the Temple of Zeus See Notes Voyager 1 Passes into the Heliosheath See Note Our Sun’s Life Cycle See Notes