How Much Power Do You Need To Destroy A Planet?

We petitioned for a Death Star to be built this year, and while the plan was turned down, it left us all asking one simple question. What would it take to actually blow up a planet? Scott Manley looked into the science of replicating the Star Wars space station. 

Turns out you'd need a lot of energy - three trillion trillion trillion Joules to be specific. With five billion in a bolt of lightning, you would need a lot. Check out the video after the break.