![]() This, he argues, is a clear waste of energy and resources, as well as being a source of frustration for many amateur astronomers. Given that outdoor activity decreased by up to 90% during lockdown, Bustamante-Calabria concludes that the late-night emissions of the city are dominated by permanent lighting that doesn’t respond to the actual behaviour of its citizens. VIIRS data doesn’t record any significant difference in the light emission of cities before and during lockdown. Most of these lights are turned off by the early hours, however, and so are missed by the satellite imagery. Nowadays, these are usually metal halide or LED lamps that produce a blue-white light, rather than the yellowy colour of sodium lamps (for more on this, read our guide to the best lighting to minimise light pollution). At times, lockdown has meant a dramatic decrease in rush hour traffic, leading to fewer headlights in towns at cities during darker months. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |