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PICTURES
Heart and Soul and Double Cluster

Heart and Soul and Double Cluster Heart and Soul and Double Cluster


Sunset at Edmontonhenge

On September 18, the setting Sun illuminated both sides of the On September 18, the setting Sun illuminated both sides of the


IAU NEWS
First Use of ISS Astronaut Pictures for Light Pollution Studies
Scientists are tapping into photographs taken by astronauts aboard the International Space Station (ISS) to reliably measure the amount of light pollution worldwide. This study not only includes the well-known signatures of cities and streets, but also the effects of faint indirectly scattered light, which up to now had not been measured quantitatively. The new results confirm that this diffuse glow, which is seen from space, is scattered light from streetlights and buildings. This is the component responsible for the brightening of the night skies in and around cities, which drastically limits the visibility of faint stars and the Milky Way. The team also concludes that European countries and cities with a higher public debt also have higher energy consumption for street lighting per inhabitant, and that the total cost of the energy consumption for street lights is 6300 million euros/year in the European Union. The findings were presented today at the IAU XXIX General Assembly in Honolulu, Hawaii.
Recipients of 2016 Gruber Cosmology Prize Announced
The 2016 Gruber Foundation Cosmology Prize recognizes Ronald Drever, Kip Thorne, Rainer Weiss, and the entire Laser Interferometer Gravitational‐Wave Observatory (LIGO) discovery team for the first observation of gravitational waves, ripples in space‐time predicted by Einstein a century ago.
  
 
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