When a planet is salvaged to it's core, it would make sense for, after a period of time, this core would cool, and leave a new crust of mineable material over a much smaller core. Burning a planet to (or near to) it's core, would cause it to become unstable. If there aren't a certain number of blocks above the core, then the planet will be flagged for crust regeneration (and processed when the server has time to do so). Any structures on the planet would be distorted, and anything in orbit would be thrown off into space.
For those that craft bases on planets, the fact anyone can come by with a salvaging beam and destroy it isn't cool at all. There should be a a way to lock a planet from salvage beams being used (except for the astronaut's beam). The role-play concept of this is interference in the atmosphere that disrupts the salvage beams. So, if a special block is placed and activated, it is consumed and the planet it blocked from salvaging because some particles were released in the atmosphere.
If a survival mode was ever added, where you start on a random unvisited world with no gear, just your suit and, perhaps a wreaked husk of a space ship (which can only be salvaged for scrap, and an undeathinator), then this starting world should also be blocked from a salvage beam being used. It would be very uncool for a greifer to strip mine a player's starting world, after all.
On the server-side, for admins that want to keep players from strip-mining worlds, then there should be an option added to the config files to set all planets by default to not be salvageable by anything except by the astronaut. This would help discourage planet mining, which increases the server load and universe save file sizes.
For those that craft bases on planets, the fact anyone can come by with a salvaging beam and destroy it isn't cool at all. There should be a a way to lock a planet from salvage beams being used (except for the astronaut's beam). The role-play concept of this is interference in the atmosphere that disrupts the salvage beams. So, if a special block is placed and activated, it is consumed and the planet it blocked from salvaging because some particles were released in the atmosphere.
If a survival mode was ever added, where you start on a random unvisited world with no gear, just your suit and, perhaps a wreaked husk of a space ship (which can only be salvaged for scrap, and an undeathinator), then this starting world should also be blocked from a salvage beam being used. It would be very uncool for a greifer to strip mine a player's starting world, after all.
On the server-side, for admins that want to keep players from strip-mining worlds, then there should be an option added to the config files to set all planets by default to not be salvageable by anything except by the astronaut. This would help discourage planet mining, which increases the server load and universe save file sizes.