Exactly he wasn't hurt much from frieza's other attacks, that's why I'm saying he could withstand the Death Star and if a planet disappeared the gravity of the planet would instantly be dispersed, so if were applying science to this vegita would be pulled in all directions at once....but rly it all comes down to dbz super being inconsistent
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Vegeta would be sent flying away as well, he is not at the center of Earth. Perhaps they were both holding back and trying not to blow up the Earth? But idk, it is impossible to get decent answers with these things as you said.