Probably the most obvious change for modern night would be the sky. Most of us living in the urban cities lost the chance of even take a glimpse of the big dipper, we lost the opportunities of feeling humble and feeling as a part of the planet. As oddinary person, we are losing out curiosity of universe and the spirit of exploration together with the stars.

Light pollution is also an increasing problem for astronomy and observatories, because artifical light not only brighten the night sky, but also affect spectra taking for objects and potentially adding inaccuracy to research. The visualization shows the site lasted 20 observatories, to avoid artificial light, they were built far away from cities.