Numerical simulations of an aerographite sail under the effect of the solar radiation force and the gravitational field of the Earth and the Sun. All trajectories assume κ_rad = 1. The Earth is shown as the large filled blue circle. The radiative force is switched off in the Earth’s shadow (dashed lines). The direction of the Sun is indicated with an arrow. Left: launch from ISS. Black lines illustrate bound orbits resulting in collision with the Earth. Green lines show successful launches into interstellar space with sufficiently low σ values (see legend). Red lines indicate immediate collision with Earth after release from ISS. The step size for σ in these numerical simulations is 0.25 × 10⁻⁶ kg m⁻². Right: launch from geostationary orbit. Line styles correspond to those in the left panel. The cyan lines (four in this plot) refer to the resonance for σ close to σ_⊙. The step size for σ in these numerical simulations is 2.5 × 10⁻⁶ kg m⁻².