i thought you said you read final crisis.
anyway, here is the planet busting feat
superman flies into the shadow moon using his infinite mass punch. but there is more to the feat than this, the moon he punched is actually moving very fast as noted by green lantern
id like to point out an error stated by batman about the moons weight being 81 billion tons its actually 81 Quintilion tons (as confirmed by the guy who wrote this scene dwanye mcduffy)
The Shadow Moon mass equals to Earth's Moon mass (confirmed by the Writer "RIP")
which is 7.34767309e+22 kg.
2. The Shadow Moon was traveling at 7,614,000 kmh which is 2,115,001,682 mph.
Anyhow, the Kinetic energy equals to one half times the Mass (kg) times Velocity squared (mph) or KE = (0.5)(Mass)(V)².
KE = 1/2MV²
KE = (0.5)(7.3476730e+22)(2,115,001,682)²
KE = 16.4339239306e+34 Joules.
The Shadow Moon had 3.92780289e+25 tons of force behind it or 3.927802087e+19 megatons worth of force, that's a lot of goddamn force. Be that as it may, I made some digging in regards of how much force it takes to blow up the Earth and I found that it takes 55e+15 megatons to complete the task which means the Shadow Moon packed enough force behind it to wipe out the Earth 7855.604174 times.
show me thor dishing out planet busting of that order.
oh and the moon was magic. and dwanye mcduffie wrote superman weaker too.