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    Is 'real space' merely a convenient mental representation?

    In quantum mechanics, a free particle is described by a continuous superposition of wavefunctions, which can be done equivalently in real or momentum space. We can look at a particle's probability distribution in real space, take its Fourier transform, and obtain the particle's distribution in...
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    Why do planets rotate?

    Any effect supernovae - or any significant body of matter - might have on a fetal Solar System would be negligible. The gravitational pull of a body many light-years away is negligible and the Moment (or torque) of such gravitational force would be just as negligible , especially if the...