Q&A with Dan Hart, president and CEO of Virgin Orbit (members only)

Watch a replay of the launch of an Atlas 5 rocket carrying the $1.2 billion SBIRS GEO Flight 4 satellite into orbit.

United Launch Alliance chief executive Tory Bruno said Thursday the company will offer more rides for CubeSats aboard future Atlas 5 rocket flights, and give some away for free, in a bid to tap into a growing market of small satellites with applications in education, scientific research and commercial business.

SpaceX’s 28th resupply mission to the International Space Station lifted off Monday from the Kennedy Space Center, carrying new solar arrays, fresh food, and experiments to sustain research and upgrade the power system on the orbiting laboratory.