NASA/Wikimedia Commons

World’s largest artificial sun lights up for clean energy research

Scientists in Germany have turned on the world’s largest artificial sun (not pictured above), an array of high-power lamps so intense they could fry a human being who gets too close. Producing this much power—up to 10,000 times the solar radiation that hits any one spot on Earth—takes as much energy over just 4 hours as a four-person household would use in a year, The Guardian writes. But researchers hope the 15-meter-tall machine near the city of Cologne, Germany, will help generate cleaner sources of energy in the future, including hydrogen fuel made by splitting water into its component elements.