Stephen Baxter's Titan (a fairly bleak novel but not totally outlandish given current world events) ends with astronauts that long ago perished on Titan being r

Stephen Baxter's Titan (a fairly bleak novel but not totally outlandish given current world events) ends with astronauts that long ago perished on Titan being resurrected by the sentient race that eventually evolves there. In preparation for the death of our star, they are preparing a rocket to send genetic matter from our solar system to other parts of the galaxy, in some way continuing our lineage.