维罗纳峭壁: 太阳系现知最高耸的悬崖
2020年11月29日 Verona Rupes: Tallest Known Cliff in the Solar System Image Credit: Voyager 2, NASA Explanation: Could you survive a jump off the tallest cliff in the Solar System? Quite possibly. Verona Rupes on Uranus’ moon Miranda is estimated to be 20 kilometers deep — ten times the depth of the Earth’s Grand Canyon. Given Miranda’s low gravity, it would take about 12 minutes for a thrill-seeking adventurer to fall from the top, reaching the bottom at the speed of a racecar — about 200 kilometers per hour. Even so, the fall might be survivable given proper airbag protection. The featured image of Verona Rupes was captured by the passing Voyager 2 robotic spacecraft in 1986. How the giant cliff was created remains unknown, but…