Due to the fact that Naruto Forums calcs can be gone, i decided to save it here

Original calc done by Gallavant here

Context

In Zone Fighter, the Alien Race called Garogas, destroy the main protagonist's planet called Peaceland, which is shown to be a gas giant.

Calc

2*atan(48/(389/tan(70/2)))

9.876290122332

Earth size (or Garoga planet's actual size): 12,742 km

Distance: 73,738 km

This time I'll actually account for the obtuse angle.. by splitting it into two right angles.

250 px: 66364.58 km

Angle 1:

If the Earth-Moon distance is the hypotenuse of the first right angle and the blue/yellow line is leg B:

66364.58^2 + b^2= 384472.282^2

4404257478.5764 + b^2 = 147818935626.287524

b^2 = 143414678147.711124

sqrt(143414678147.711124)

Leg A is 378701.3 km

Angle 2:

If the distance to the Garoga planet is the hypotenuse of the second right angle and the blue/yellow line is also leg B:

66364.58^2 + b^2 = 73738^2

4404257478 + b^2 = 5437292644

b^2 = 1033035166

sqrt(1033035166) = 32140.864

Leg A is 32140.86 km

32140.864 + 378701.3 = 410842.16 km

2*atan(147/(389/tan(70/2)))

degree size: 29.641925985284

410842.16 km distance

when solved for size:

217,420 km diameter

Cool, 1.737E+27 kg

At this size the KE of the planet's explosion starts nearing superluminal speeds:

32 px = 66021 km

82 px explosion = 169178.8 km diameter explosion

169178.8 - 66021 = 103157.8 km

103157.8 / 2 = 51578.9 km expanded in all directions

5 frames

25 frames per second

0.2 seconds

51578.9 / 0.2 = 257894.5 km/s gas cloud

Mass of planet: 1.737E+27

Velocity: 86% the speed of light

Putting the info here, the results we get are...1.497E+44 Joules

Large Star level. That's stronger than a supernova!

(Edit)

Apparentaly, it seems like i got some things wrong, here's the fixed version:

32 px = 217,420 km

82 px explosion = 557,138.75 km diameter explosion

557,138.75 - 217,420 = 339,718.75 km

339,718.75 / 2 = 169,859.375 km expanded in all directions

5 frames

25 frames per second

0.2 seconds

169,859.375 / 0.2 = 849,296,875 m/s gas cloud

Mass of planet: 1.737E+27 kg

Velocity of gas cloud: 849,296,875 m/s

849,296,875 m/s, so putting this alongside the Mass over here, the feat now becomes 6.26454e+44 Joules, still Large Star level, but way, way higher now.

Results

1.497e+44 Joules (Large Star level) (Old)

6.26454e+44 Joules (Large Star level) (Updated)