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porchdragon favorited a video
(2 days ago)
This is a short film (a fast paced preview of a larger effort) by MAYA D...
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This is a short film (a fast paced preview of a larger effort) by MAYA Design created to put some perspective on the invisible but fast approaching challenges and opportunities in the pervasive computing age. For more information please visit: http://www.maya.c... Really interested in the implications of a trillion-node world? Read Dr. Peter Lucas's seminal white paper that not only predicted this sort of scaling and complexity but outlined some of the resilient patterns that we need to follow to get there from here. http://www.maya.c...
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porchdragon favorited a video
(5 days ago)
The Solar System's birth was far from peaceful. Witness the spectacular ...
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The Solar System's birth was far from peaceful. Witness the spectacular explosion known as the "Big Bang".
Naked Science: Birth of the Solar System : TUES NOVEMBER 6 8P et/p : http://channel.na...
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porchdragon favorited a video
(5 days ago)
A supernova is one way that a star can end its life, exploding in a disp...
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A supernova is one way that a star can end its life, exploding in a display of grandiose fireworks. One family of supernovae, called Type Ia supernovae, are of particular interest in cosmology as they can be used as standard candles to measure distances in the Universe and so can be used to calibrate the accelerating expansion that is driven by dark energy.
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porchdragon favorited a video
(1 week ago)

The center of our Milky Way Galaxy, located about 27,000 light years fro...
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The center of our Milky Way Galaxy, located about 27,000 light years from Earth in the direction of the constellation Sagittarius, is occupied by a supermassive black hole. This black hole contains over 4 million times the mass of our Sun in an area smaller than half the orbit of Mercury. Matter accreting into the black hole is heated up to millions of degrees, which makes the area shine bright in radio and infrared waves. This radio source is called Sagittarius A*; the black hole itself cannot be seen.
http://en.wikiped...
Over the past 16 years, astronomers have tracked a full orbit of a star, S2, around the black hole. At it's closest point (perinigricon), S2 comes to within 17 light-hours of the black hole. From studying the Keplerian motions of S2 and other stars near the Galactic Center, astronomers have determined that these stars must be under the influence of an enormously massive, compact object. The only celestial object that could meet those requirements is a black hole. A huge black hole.
This video begins with a picture showing the central 3 light years (central parsec) of our Galaxy. It then goes into a full zoom from our viewpoint to the Galactic Center, then shows the orbits of various stars around the black hole.
Credit: ESO http://apod.nasa....
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porchdragon favorited a video
(1 week ago)
an animated scenario about the formation of stars in a cluster, and the ...
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an animated scenario about the formation of stars in a cluster, and the evolution of cluster itself. A star that is being formed makes a chain reaction and other stars are born
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