Our nights are brighter, and brighter | | The International Dark-Sky Association has campaigned for decades to reduce artificial light at night. Yet a new study shows our night skies still brightening at a rate of 2 percent each year. | | |
Do you know Messier 33? | | Say hello to the much-photographed Triangulum galaxy - aka Messier 33 - a face-on pinwheel of swarming suns and the second-nearest spiral galaxy to our Milky Way. | | |
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