SpaceTentative

Space Reactor‑1 Freedom

expected 2028

expected 2028

—hype

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    Photo: NASA · Public domain · via Wikimedia Commons

    About this moment

    Space Reactor‑1 Freedom is expected 2028. The exact day has not been announced yet.

    Spacecraft launch, with the target date from Wikidata.

    Space Reactor-1 Freedom (SR-1) is a pathfinder NASA spacecraft intended to be the first nuclear fission-powered interplanetary mission and to demonstrate nuclear electric propulsion (NEP) in deep space. Announced in March 2026, the spacecraft would combine a closed Brayton cycle fission reactor generating more than 20 kW of electrical power with the Power and Propulsion Element (PPE) previously developed for the Lunar Gateway space station.

    Summary from Wikipedia (CC BY-SA 4.0)

    This listing uses an approximate period. An exact day has not been confirmed.

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    Worldwide
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    Date source

    Wikidata

    Source last checked Oct 19, 2026

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