Galaxies are held together by gravity
The quick answer is no! The quick reason why is because gravity sticks them together so strongly they would be impossible to tear apart. The explanation comes down to gravity. Most big things in the universe – like planets, stars and galaxies – are held together by gravity. Earth stays together because the atoms that make up our planet all pull towards each other, and pulling them apart would take energy. If you were a supervillain who wanted to destroy the Earth, you’d need to put in enough energy to overcome that gravitational attraction. The amount of energy that you’d need to use to pull something apart is called the gravitational binding energy.
The gravitational binding energy of our Milky Way is around 1054 joules – that’s a one followed by 54 zeros! This is how much energy you’d need to put in if you wanted to split our galaxy apart. We can even use the most famous equation in science – E=mc2 – to work out how much energy this is. It turns out that you’d have to vaporise 10 million Suns into pure energy to split apart a galaxy! Fortunately, this is probably beyond even the most nefarious supervillain.