Instead of just blowing up planets and stars, there should be an 'Orbital Bombardment' option or module available

It wouldwork like this: you just take a ship (presumably one with at least class 7 weapons, or a special module) then blast the planet from space with missles

Instead of all that messy invasion, you just reduce it to slag. It would probably wipe out at least half the populatio and planetary buildings, and severly reduce the quality of the planet, but it would be good if you didn't have a Troop Transport yet or didn't want to go to all the work of invading it.
Perhaps there could be four Omega-Class ships; one could devastate the planet's surface, one could actually blow up the planet, one could induce a star to go nova, and a final one could create a black hole.
After researching all three of the weapons to the max (Doom Ray, Black Hole Gun, etc.) you could then start researching a final, panultimate class of weapons. The first tech would allow you to zap a planet's surface, killing off most of its inhabitants and automatically giving you an evil alignment when used (as would using any of the following devices).
The second would allow you to obliberate the planet (possibly giving a bonus to any Economic Starbase in the area with Production Modules). These two would only be usable if the planet was undefended, obviously. A new planetary improvement could counteract that (Planetary Shields, perhaps?

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The third would allow you to blow up a star and anything else within 5 parasecs of it (there would be a considerable wait time as the Star Terror destabilized the star's core, of course). This would include any ships in the area and possibly the planets (they would onlybe able to sustan .25 billion people, due to the lack of sunlight, but could be used for manufacturing).
The fourth and final device would allow you to collapse a ship, fleet, starbase, planet, or star into a black hole

It would instantly destroy both object, but the black hole would remain for at least 30 turns (if a ship wandered near it and was sucked in, then the black hole would 'grow'; otherwise, it would disappear). Any ships, starbases, or planets nearby (2-3 parasecs) would get sucked in, with a reduction in speed for all ships in a larger radius (4-7 parasecs). Using this device would instantly drop you into an Evil Alignment and alienate all of your allies; all neutral players would be enticed into going to war against you, and all of your enemies would enter an allianceto fight against you). You might even be able to send a survey ship into the black hole to discover new universes or get incredible discoveries and bonuses.