Chris Hadfield captures Earth Hour from space

Tonight's Finale: Dawn sneaking in under the Northern Lights. When we turn our lights down, nature...

Tonight's Finale: Dawn sneaking in under the Northern Lights. When we turn our lights down, nature lights up the sky. @Cmdr_Hadfield tweeted on March 23, 2013.

QMI Agency

, Last Updated: 2:56 PM ET

While more than 7,000 cities, towns and municipalities in more than 150 countries and territories went dark for an hour Saturday to celebrate Earth Hour, Canadian astronaut Chris Hadfield kept busy recording the event from space.

Hadfield tweeted images of Baltimore, Detroit, San Francisco, New York and Las Vegas from the International Space Station.

In his last tweet Saturday, Hadfield wrote: "Tonight's Finale: Dawn sneaking in under the Northern Lights. When we turn our lights down, nature lights up the sky."

World Wildlife Fund-Canada said Russian cosmonaut Roman Romanenko sent a video message from space shortly before The Kremlin went dark and Red Square plunged into darkness for the first time to mark the passing of legislation to protect Russia's seas from oil pollution.

"The first time I stepped on the board of the International Space Station and saw the Earth from outside, I was amazed by how beautiful and fragile it was. Our planet is the most precious treasure that we have. It is our home and we fully depend on it. And its existence depends on us as well. It depends on our attitude to it and on how we use its resources," said Romanenko from the International Space Station.

The global movement recorded another first Saturday.

WWF's Earth Hour City Challenge went global for the first time and produced 17 finalist cities from six countries.

"Announced as the first ever Global Earth Hour Capital, Vancouver was recognized unanimously by a jury of experts for its innovative actions on climate change and dedication to create a sustainable, pleasant urban environment for current and future residents," WWF said in a statement.


Videos

Photos