On the hull the four big interstellar stacks sucked at the thin hydrogen and converted it to a weak forward force. Something big enough to set off Roger's sensors also set your lifeclock running. And the shroud of chemicals holding death temporarily at bay thinned to a shiny, translucent skin. Funny how that works. Coming to life around you, Roger complains repeatedly.
Several systems are due for periodic maintenance.
They can wait. What probably started out as a rock a few centuries ago lies ahead. Somebody obviously set up housekeeping there at one time or another. Surface features indicate definite mechanical alteration.