Every Cosmic Herald story on Sierra Space — missions, launches, discoveries, and the business of space, newest first.
L3Harris and Sierra Space will build 36 new missile-tracking satellites for $1.75 billion, pushing the Space Development Agency's Tranche 3 constellation to 104 spacecraft in support of the Golden Dome missile-defense architecture.
Read the story →The Space Development Agency awarded L3Harris and Sierra Space a combined $1.75 billion on July 13 to build 36 missile-tracking satellites for Golden Dome's Tranche 3, targeting launch by the end of 2028.
United Launch Alliance's Vulcan Centaur has completed its certification flights and is entering regular commercial service. The rocket is designed to handle everything ULA's Atlas V and Delta IV carried — and it's arriving at a moment when the launch market is more competitive than it has ever been.
The International Space Station is slated to retire around 2030, and NASA is betting that private companies will build what comes next. A wave of record funding in 2026 is fueling a contest among several rival stations to be first.
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