I'm writing a story about a person who is spurred to find someone they love due to an unexpected extinction event. I think I've picked an asteroid crashing into us (get out of here, Bruce Willis), but my concern is: wouldn't we see a giant asteroid coming months away? Is it at all plausible that we wouldn't know about a large-enough-to-destroy-the-earth asteroid/comet until like...3 days before it shows up? (I need the event to be far enough away that there isn't much time to plan, but not so sudden that it's like "oh crap, it's he-*DEAD*).
The story is set today, in our world. The idea doesn't need to be flawless, just not distractingly bad. Very little time will be spent discussing the asteroid itself, as the story focuses on the character, not the event.
The story is set today, in our world. The idea doesn't need to be flawless, just not distractingly bad. Very little time will be spent discussing the asteroid itself, as the story focuses on the character, not the event.