Lunden repeated what she told me in an earlier interview. The parks are put in place by the Dark Sky Places program with the intention to remind us that the night sky serves just as much importance to our culture and history as our day-time sky..  Flagstaff is a city of over 70,000, but because of their lighting, their skies are dark enough to see the Milky Way. There aren’t that many of these fixed sensors in the region, which is why Aclima sends drivers around the area in Google Street View electric cars to measure pollution with sensors. Use the lowest wattage of lamp that is feasible. or canst thou guide Arcturus with his sons?” – Job 38:32, KJV.). Smoke particles scatter sunlight differently depending on the wavelength of the light. Lunden cautioned that you can’t judge whether the air is safe enough to take a walk based on what you smell. Yes, that can happen, especially if the colder air is not moving in from the ocean during the night. It’s far enough north on the sky’s dome that – for Northern Hemisphere observers – it’s visible during some part of the night throughout most of the year. If the ground air is cooler, the inversion will hold and the bad air won’t come down to us. Some communities are becoming aware of this problem and are putting forth efforts to minimize the hazy, orange skyglow. The difference in atmospheric pressure between the cool Pacific and the heating inland regions results in an onshore wind that starts to build mid-morning to a strong flow by late afternoon. The hot weather in the Bay Area over the last few days can counter that, however, as the heat can block cold weather coming in from the ocean and stop that cool air from making its way inland. Boötes has the shape of a kite, and Arcturus is at the point where you’d attach a tail. “Blade Runner 2049 had this orange air, and we know that desert air can be orange,” Lunden said. Orange Arcturus is more evolved than our sun and has swollen up to a larger size. I can’t even imagine what concentration we would see if all of what we had on top of us right now actually mixed down to the ground level.”. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named 3505 Byrd in her honor. Normally, the gas molecules in the air scatter the blue light in all directions and this scattered blue light is what we see. Above: With the exception of a few hours in the morning in Oakland and San Francisco, Wednesday’s air wasn’t that polluted. People either love it or detest it. Local businesses air for a couple of days ] 1991 and founded EarthSky.org in 1994 sunlight! Down, the evening, this smoky air comes down some classical Greek stories, Boötes Icarus. Smoke anymore effects of light pollution times greater in diameter than our sun news stories to internally... 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