  Exporting terrestrial life out of the Solar System requires a process that
both embeds microbes in boulders and ejects those boulders out of the Solar
System. We explore the possibility that Earthgrazing long-period comets and
interstellar objects could export life from Earth by collecting microbes from
the atmosphere and receiving a gravitational slingshot effect from the Earth.
We estimate the total number of exportation events over the lifetime of the
Earth to be $\sim 1 - 10$ for long-period comets and $\sim 1 - 50$ for
interstellar objects. If life existed above an altitude of 100 km, then the
number is dramatically increased up to $\sim 10^5$ exportation events over
Earth's lifetime.
