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Sierra Space
Every Cosmic Herald story on Sierra Space — missions, launches, discoveries, and the business of space, newest first.
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2026-07-15latest coverage
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Commercial
ULA's Vulcan rocket is flying. What it means for the launch market.
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.
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Commercial
With the ISS nearing retirement, the race to build its replacement is on
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.
