Canadian astronaut Commander Chris Hadfield, currently on board the International Space Station, has been tweeting images of major cities prior to Earth Hour.
He wrote, "New York City, lit up like a bulb. The Statue of Liberty is clearly visible in the night from above".
The commander also highlighted that "spiderwebs of light expanding out from the dark river border" could be seen of Detroit and Windsor.
More top news
Ben Moynihan attacked three women in random stabbings when he was 17 because he could not lose his virginity.
The cable car at Ciampinoi in Italy ground to a halt after high winds blew a tree over the cable deeming it unsafe.
A school has defended its decision to stop a pupil taking part in World Book Day while wearing a Fifty Shades costume.