SpaceX
Watch Starship Flight 10 single-engine static fire [Video]

SpaceX has shared a video of a single-engine static fire test up close from the engine assembly section in preparations for Starship Flight 10.
The company has posted this video on the social media site X, showing one of the three center Raptor engines, blowing fire for 5-6 seconds before shutting down.
SpaceX has designed the Raptor engine to relight in the vacuum of space to support payload delivery, changing trajectory, and deorbiting the ship en route to Earth.

Starship flight 10 single-engine static fire (source – SpaceX)
This mechanism is currently being tested and was first achieved during Flight 6, but cannot be repeated for the second time since Flight 7 due to SpaceX introducing a brand new upper stage with upgrades.
However, Flight 9 was pretty close to this milestone, and the single-engine static fire test could be a sign that Flight 10 might get this completed.
Learn more about the single-engine static fire in the article here.