Impact Ships
Description
Impact ships are designed to collect and launch asteroids or comets to impact with a planet. Generally this is accomplished by landing thruster-drones on the object in order to dock it to a powerful railgun attached to the ship.
The technology was developed to terraform a planet by adding mass and desired chemicals (such as water and oxygen) to its environment. This can boost a planet's gravity, improve its atmosphere, and even create oceans.
Unfortunately, the more cruel leaders and commanders also learned to use impact ships to rain destruction on whole planets. The democratic societies of the galaxy see this later use of the technology as a crime, while the more despotic and Machiavellian see it as a means to an end.
During Era-2, the Holy Empire of Man included a large number of impact ships in its "Purification Fleet".