【過去記事追記】2000年の灯り 2012年の灯り Bright Lights, Big City

過去記事2000年の灯り　2012年の灯り　Bright Lights, Big Cityの追記

Earth’s City Lights 1994
https://earthobservatory.nasa.gov/images/896/earths-city-lights-1994

City Lights, 2003
https://earthobservatory.nasa.gov/images/36008/city-lights-2003

Night Lights 2012 Map
https://earthobservatory.nasa.gov/images/79765/night-lights-2012-map

Night Light Maps Open Up New Applications 2016
https://earthobservatory.nasa.gov/images/90008/night-light-maps-open-up-new-applications

Japan at Night 2017
https://earthobservatory.nasa.gov/images/147987/japan-at-night