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.
Mirror Lake will make a procedurally generated bowl for you. Sometimes the bowl is empty, which sounds like a parable, but mostly it is just a bowl. Sometimes it is in space. Click again, and you’ll be greeted with another bowl. Other features of its landscape may include: mountains, trees, stones, ponds, birds, comets, planets, […]
As noted in Cory’s review, Kim Stanley Robinson’s Aurora makes an undeniable case for ecological stewardship through a rigorous, gripping technological speculation about climate science, biology, space propulsion and sociodynamic factors. In this exclusive feature essay, Robinson explains the technology behind the best science fiction novel of 2015.
“Rocket” is not one of the 1,000 most common words in the English language, so it’s called an “up goer” in the excellent xkcd video that explains space travel in simple terms. It’s adapted from xkcd creator Randall Munroe’s book, Thing Explainer: Complicated Stuff in Simple Words.”
Carrying this EDC card is like slinging around a handheld toolbox wherever you go. Its minimal design is small enough to fit in your wallet’s billfold, and it’s TSA-compliant so you’ll never leave it behind. It’s got hex wrenches, metric and imperial rulers, flathead and Phillip’s screwdrivers, and a bottle opener so that you’re ready […]
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