Live coverage: Delta 2 launches

After an exhaustive investigation, SpaceX engineers have identified the most likely cause of the spectacular explosion of a Falcon 9 rocket during a pre-launch test Sept. 1 that destroyed the booster and its $195 million satellite payload, the company announced Monday.

Ten more satellites for Iridium’s upgraded voice and data communications fleet rode a SpaceX Falcon 9 rocket into a nearly 400-mile-high orbit from California’s Central Coast Monday.

Eight miniature weather observatories, each the size of a piece of carry-on luggage, were installed on a specially-designed deployer module and mounted on the front end of an air-launched Pegasus XL rocket to prepare for Monday’s flight into orbit.