https://www.scientificamerican.com/article/as-massive-storm-rages-on-mars-opportunity-rover-falls-silent/ > NASA’s Opportunity rover on Mars did not return a call from Earth Tuesday (June 12) while enduring a massive dust storm that scientists have called “one of the most intense ever observed." > “The Martian dust storm that has blotted out the sun above Opportunity has continued to intensify,” NASA officials wrote in a mission update Tuesday. “The storm, which was first detected on May 30, now blankets 14 million square miles (35 million square kilometers) of Martian surface—a quarter of the planet.” That means Opportunity’s solar panels aren’t getting enough sunlight to phone home from its Perseverance Valley location on Mars.