Called GRACE-FO, for short, the mission will detect the movement of Earth's water masses and changes in mass within the planet by measuring variations in gravity through tiny fluctuations in the distance between the two satellites as they orbit 137 miles (220 kilometers) apart -- roughly the distance between Los Angeles and San Diego -- at an altitude of about 304 miles (490 kilometers).
Crews make progress in deadly California wildfire fight; Claudia Cowan reports from Solano County. A vast smoky pall from California's wildfires has been spotted from space by NASA's Terra satellite. A remarkable image captured by the satellite on Aug. 24 shows smoke from hundreds of fires stretching across much of the state. Since Aug. 15, hundreds of fires have burned nearly 2,000 square miles, an area roughly the size of Delaware. The blazes have killed at least seven people, burned some 1,300 homes and other buildings, and prompted evacuation orders that still affect about 140,000 people.