Okay, we had the scene at the end of ONI: Sword Base, but that was likely a low-power shot.
If I recall correctly, a super MAC has a yield in the gigatons, though it may have been retconned. That's more than a hundred times the energy of the Tsar Bomba, which was already unimaginably powerful. I'm guessing it could potentially be more effective at glassing a planet than the covenant energy projectors, and possibly even causing earthquakes and tectonic disturbances(I am not a geologist).
[Edited on 07.28.2012 5:52 AM PDT]
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[quote][b]Posted by:[/b] FTW 1997 The nova bomb hasnt destroyed a planet, only a fleet and a moon as i remember ?[/quote] And...? It destroyed planet's ecosystem and atmospheric/biosphere via scorching half of the planet and sending massive natural disasters such as massive tsunamis, etc and large doses of radiations killed all life on the planet. That is 1.2 petatons for NOVA bomb. And yes, SMAC can cause nuclear-like winter because it has enough destructive power to potentially devastate entire ecosystem which it affects all life. 51.6 gigatons is 51,600,000 megatons. Let me show you difference: Kiloton = town killers Megaton = city killers Gigatons = multiple state killers Teratons = entire continent killers Petatons = half planet killers above of that, entire planet killer. [Edited on 07.28.2012 3:05 PM PDT]