The wisdom of satellites

London at night

As this photo shows, taken from the International Space Station in February 2003, there's a lot of light pollution in London. The M25 Orbital Motorway shows up particular brightly as a ribbon of light, encircling the city. There's not much chance of us seeing any of the celestial action so beautifully captured at Astronomy Picture of the Day.

Europe at night

You can see night across the whole world here