Commending to the Starry Deep

I wonder who the first human will be to die in space, never to return to eir mother planet?

While space travelers have died, to this point all have returned their atoms to the world that bore them. Eventually a spaceship will be lost, a star voyager will float away, a suit will no longer sustain, or a lander on some foreign body will fail to ascend. At that point, we will have crossed the Rubicon and proved our commitment to the exploration of the Universe.