Boeing says it is on track to fly its CST-100 commercial crew vehicle in September and December 2017 for the first U.S.-launched human missions to the International Space Station since 2011.

SpaceX says it remains at least “a couple of months” away from returning to flight following the Falcon 9 launch failure on a resupply mission to the International Space Station on June 28, partially because the company’s accident investigation has taken longer than expected.

"Craters should be bowl shaped, but this one had terraces," said Ali Bramson, University of Arizona graduate student researcher.

We round up five of our most read stories in August, and your reaction to them.

Republican lawmakers have questioned whether SpaceX is receiving special treatment in NASA’s oversight of the two commercial launch providers, but NASA Administrator Charles Bolden says that is not the case.

The top aerospace and defense stories you may have missed this week include Airbus starts A350-1000 wing assembly and Lockheed Martin studies 'stealthy' U-2 replacement.

Researchers from eight U.S. universities will pursue early stage advances in support of NASA space program technology needs that range from high temperature tolerant solar cells and enhanced thermal protection systems to food production.

The agency this week is issuing three concept development contracts for the new Multiple Object Kill Vehicle (MOKV) program, one each to Lockheed Martin, Raytheon and Boeing.