I took a challenge story back on March 24, and since then I’ve
Calculated a Hohmann transfer orbit from LEO to the Earth-Moon L4 point.
Calculated another such transfer orbit (from Jupiter to Earth) to represent the planet-killing asteroid’s fall toward the Sun and thus the Earth.
Looked up several minor moons of Jupiter.
Done research into how dark matter can hypothetically collapse into small objects like planets or asteroids.
Looked into the differences between baryonic and non-baryonic dark matter, to explain why nobody sees the object coming but it can still cause a mass extinction upon impact, and…
Done research into a proposed space colony (the Stanford Torus) to have dimensions and structural plans for the station upon which our characters escape the devastation being inflicted on Earth.
All of this for a mostly-incest PWP where a young man, his mother, his female best friend and his elder sister must repopulate the human race.
I may have gone overboard.