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A new composite image published by NASA shows some galaxies as they were 13.2 billion years ago, presenting a small section of space in full color. Known as the Hubble eXtreme Deep Field (HXDF) , the view is the product of more than 2,000 individual images taken by the Hubble Space Telescope over the past ten years, with a total exposure time of more than two million seconds — it complements the existing Ultra Deep Field (HUDF) , which shows a wider area. While the HXDF shows roughly 5,500 individual galaxies, it represents only a tiny fraction of the known universe. According to an explanatory video, embedded below, the telescope would have to take another 30 million images to provide anything close to a full, panoramic representation. Check out a 2382 x 2078 JPG of the HXDF here , or download the full, 13MB TIF file for a closer look — the team behind the image will be answering questions on Google+ from 1:00 PM ET tomorrow. <p style="text-align:right;color:#A8A8A8"></p>
New Hubble space telescope image peers 13 billion years back in time
MSL Curiosity
NASA TV
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Dr Marek Kukula, Public Astronomer at the Royal Observatory, Greenwich, takes readers on a hitch-hiker's guide to our solar system using this collection of photographs showing the best "tourist" attractions of our solar system. The collection of pictures has been put together as the Royal Observatory launches its 2011 Astronomy Photographer of the Year contest, for pictures captured by humans.
Astronomer's guide to the solar system
SCIENCE PHOTO LIBRARY / NASA / BARCROFT MEDIA by Dec 19
cern
amazing maths
next world
quantum computer
La vitesse de la lumière et Einstein dépassés par une particule?
«Totalement inattendu», «étonnant»... Les physiciens n'en croyaient pas leurs instruments mais ils pensent bien avoir mesuré une particule dépassant la vitesse de la lumière, pourtant considérée comme une «limite infranchissable» dans la théorie d'Einstein.
langage
Graphing the history of philosophy « Drunks&Lampposts
A close up of ancient and medieval philosophy ending at Descartes and Leibniz This one came about because I was searching for a data set on horror films (don’t ask) and ended up with one describing the links between philosophers. To cut a long story very short I’ve extracted the information in the influenced by section for every philosopher on Wikipedia and used it to construct a network which I’ve then visualised using gephi
Quel philosophe et quelles influences ? L’histoire de la philosophie n’est pas un long fleuve tranquille et les implications des travaux et idées des précurseurs de la philosophie occidentale sont une source d’inspiration sans fin pour les générations de penseurs qui leur ont succédé. Le blog Drunk&Lampposts , en la personne de Simon Raper , nous propose une visualisation tout à fait surprenante des relations d’influence entre philosophes référencés sur l’encyclopédie en ligne Wikipédia . Pegasus Data a obtenu de vous en fournir une traduction française (retrouvez l’ article original ) que nous augmentons de commentaires.