A beautiful, informative, and surprising video from NASA. [link]
This video of the sun based on data from NASA's Solar Dynamics Observatory, or SDO, shows the wide range of wavelengths -- invisible to the naked eye -- that the telescope can view. SDO converts the wavelengths into an image humans can see, and the light is colorized into a rainbow of colors.
As the colors sweep around the sun in the movie, viewers should note how different the same area of the sun appears. This happens because each wavelength of light represents solar material at specific temperatures. Different wavelengths convey information about different components of the sun's surface and atmosphere, so scientists use them to paint a full picture of our constantly changing and varying star.
Yellow light of 5800 Angstroms, for example, generally emanates from material of about 10,000 degrees F (5700 degrees C), which represents the surface of the sun. Extreme ultraviolet light of 94 Angstroms, which is typically colorized in green in SDO images, comes from atoms that are about 11 million degrees F (6,300,000 degrees C) and is a good wavelength for looking at solar flares, which can reach such high temperatures. By examining pictures of the sun in a variety of wavelengths -- as is done not only by SDO, but also by NASA's Interface Region Imaging Spectrograph, NASA's Solar Terrestrial Relations Observatory and the European Space Agency/NASA Solar and Heliospheric Observatory -- scientists can track how particles and heat move through the sun's atmosphere.
I am frequently asked about this beautiful telescope! People think it is a bong! The Edmund Scientific Astroscan sits in the center of my living room coffee table. I have heard astronomy buffs screech like wounded monkeys at the idea of my actually using this telescope to view the skies. I’m no celestial connoisseur, and […]
Who needs the Onion? “Don’t know how long it’s going to take, but this news that there is flowing water on Mars is somehow going to find its way into a technique to advance the leftist agenda.”
Well, this is big. NASA today revealed that new findings from NASA’s Mars Reconnaissance Orbiter (MRO) provide “the strongest evidence yet that liquid water flows intermittently on present-day Mars.”
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