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Two puzzles in the Égaré Series have been referenced by the Prepositions in Space puzzle for this challenge: Rock from the Sky and Orbital Deflection. We have been offered four choices for answering the question: What is your explanation for the Impact Sight sculpture?
1. Insufficient Deflection
This alternative explanation seems to invoke a suborbital stratagem for asteroid Égaré known as skip-glide, in which a spacecraft uses aerodynamic lift in the upper atmosphere along with intervals of ballistic coasting to extend its range during reentry while reducing the heat load inflicted by air-friction. However, an asteroid lacks the appropriate shape for a lift-to-drag ratio greater than unity. Not only that but those coasting intervals in the coldness of space do nothing to burn off the asteroid's bulk by a factor of ten to match its remaining dimensions to those of the Impact Sight sculpture.
2. Deflection Shrapnel
Indeed, the explosive device described in the solution to Orbital Deflection is set off at a point within the bulk of asteroid Égaré to produce thrust by a 'mass flow' at extremely high velocity in the opposite direction. The materials in the ejecta include gases and solids comprising a minute fraction of the asteroid's mass -- an amount so small that even if all of it were solid and in one piece, it would not match the size of the Impact Sight sculpture.
3. Directional Preposition
As lamented in the puzzle, some prepositions cannot be applied in space to designate directions. That is especially unhandy for ∆V Normal, for which one might want to use above or below (the orbital plane). Neither preposition makes sense in space.
But caution is advised: If the wrong direction is chosen, the orbital inclination gets reduced, and the impact by Égaré will be far worse than that depicted in the Impact Sight sculpture.
4. Something else entirely
This alternative explanation is the only choice left for our solution...