4 ms·It's possible, but it may or may not require exotic things like negative mass.by xwdv 5y agoIt's possible, but it may or may not require exotic things like negative mass.mr_toad 5y agoImaginary mass, not negative mass.rbanffy 5y agoSo we can just imagine what it’ll look like? Sorry. Couldn’t resist. But you can have real mass with imaginary energy.