Salar de Uyuni, or the Uyuni Salt Flats, are the world’s largest salt flats at 3,900 square miles (10,000 square km). The Uyuni Salt Flats are in the Daniel Campos Province in Potosí in southwest Bolivia, far from any major cities. With an altitude of 11,995 feet (3,656 meters) above sea level, visitors should take care in adjusting to the high altitude. The immense expanse of white salt that can easily be seen from space has a surface elevation of less than 1 meter, making it ideal for NASA and ESA to use for calibrating satellite radar altimeters. An EarthSky user explains the appeal of Salar de Uyuni: “Why is it a good place for stargazing? The lack of light pollution, clean air, huge night skies and visually breathtaking amazing surroundings of ethereal white beauty. The white salty surface is highly reflective and creates a mirror reflection of the night sky above.”
Deborah Byrd created the EarthSky radio series in 1991 and founded EarthSky.org in 1994. Today, she serves as Editor-in-Chief of this website. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named 3505 Byrd in her honor. A science communicator and educator since 1976, Byrd believes in science as a force for good in the world and a vital tool for the 21st century. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says.