It's not just the stars that twinkle in the dark of night. The Earth is twinkling too.
NASA has released new, spectacular images of our planet at night, from a satellite orbiting 512 miles above the Earth's surface. The agency stitched some of these images together to create a composite image of the entire planet. They call it the Black Marble.
But the cobweb of city lights that stretch over the planet is just one of the images that the super sensitive light sensor captured. It also sent back images of Auroras over Antarctica, volcanoes and natural gas flares.
The sensor, called VIIRS (Visible Infrared Imaging Radiometer Suite), is so sensitive that it can see a single boat light floating in the ocean, or a single street lamp if it was standing alone in a barren desert. It is aboard the Suomi National Polar-orbiting Partnership that was launched in October 2011 by NOAA and NASA.