Tag: Science
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Astronomy Video of the Day | Clouds and Stars over Cotopaxi Volcano in Ecuador
[youtube=http://www.youtube.com/watch?v=6B0Kd9vk11Y&hl=en_US&fs=1&color1=0x006699&color2=0x54abd6]
Clouds and Stars over Cotopaxi Volcano in Ecuador
Credit & Copyright: Stéphane Guisard (Los Cielos de America), TWAN
Explanation: What’s happening above the Cotopaxi volcano in Ecuador? Quite a bit, from the looks of the above one-night, time-lapse movie, taken earlier this month. The majestic volcano is first seen through breaks in fast moving clouds as the movie begins. Soon the clouds have dissipated and a sky filled with stars seems to rotate about the snow-peaked volcano’s peak. The band of our Milky Way Galaxy, the dark Coal Sack nebula, and the Southern Cross can all be seen overhead. Satellites streak by from several directions. Soon thin clouds roll by and seem to make the brightest stars sparkle. On the volcano (starting at about 1:13 of the movie), the lights of climbers flash. Near the end of the movie, a bright airplane passes over the peak with a residual trail seen drifting away.
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Astronomy Picture of the Day – Scattered Light from the Boomerang Nebula
The Hubble Space Telescope caught the Boomerang Nebula in this image taken with the Advanced Camera for Surveys in early 2005. This reflecting cloud of dust and gas has two nearly symmetric lobes of matter that are being ejected from a central star.
Hubble Catches Scattered Light from the Boomerang Nebula. Credit: NASA, ESA and The Hubble Heritage Team STScI/AURA)
Each lobe of the nebula is nearly one light-year in length, making the total length of the nebula half as long as the distance from our Sun to our nearest neighbors – the alpha Centauri stellar system, located roughly 4 light-years away. The Boomerang Nebula resides 5,000 light-years from Earth. Hubble’s sharp view is able to resolve patterns and ripples in the nebula very close to the central star that are not visible from the ground.

