From an airplane you can see a diffuse glow from a city at night. To simply say cities produce light is not enough. Only when you get closer do you see individual sources that make up that glow - the house lights, street lamps and automobile headlights. In this respect, we have identified the individual sources of local X-ray light. What we found will surprise many scientists. |
Only when you get closer do you see individual sources that make up the glow. |