What would happen to a planet after a quarter of it had been blown up?

An alien species has created a weapon. The alien stands on a planet, points the weapon at the ground, and pushes a button. A large amount of matter condenses itself into a mass, creating a huge hole in the planet's mantle. The mass is like a time bomb that gives the alien enough time to escape through a portal. The mass explodes, cutting a huge chunk out of the earth.

I'm assuming the liquid metal insides of the planet would start to come out. Would the liquid harden since it's exposed?

The explosion would likely kill all life on the planet. Would the planet collapse on itself to reform a sphere? What would happen to the planet's orbit?

posted over 6 years ago

Lindy Ray‭

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