Originally posted by The Merchant
Sadow moving stars was through the use of the dark side crystals on his ship which everyone credits it having the power to destroy stars and not Sadow. Luke clears but with difficulty.
When Sadow obliterated the star of Primus Goluud, it's stated that he "activated a superweapon" to destroy it.
Yet when he annihilated the fleets with the solar flares from the Denarii Nova, it's stated that he uses "Sith powers" to cause those flares. Though I'm pretty sure he cites the "powers of the Sith" when he uses the Corsair crystals during the Primus Goluud feat.
Originally posted by MS Warehouse
It was never in doubt that Sadow used his ship's sith technology to activate solar flares. If you want to argue what he did more by himself, it was illusions on a galactic scale.
I seem to recall a quote saying that he himself enchanted the crystals, which would make it possibly the best Alchemy showing in the mythos.
The Illusions and stuff were done in the Meditation Sphere, which Sorzus Syn claims "enhances one's powers a thousandfold". But it's still incredibly impressive.
Originally posted by Ursumeles
In Dark Nest he said otherwise, IIRC.
I didn't read a single book from the NJO era so I don't know it from first hand, but I saw Silver mention it before. And now looking back at the post he made, he said that Luke was stated to holding back his full power in the following sources:
Return of the Jedi
Luke Skywalker and the Shadows of Mindor
The Courtship of Princess Leia
Dark Empire
Before the Storm
Specter of the Past
The Unifying Force
Legacy of the Force