  A new quantum electrodynamical method of calculations of bremsstrahlung
spectra in the $\alpha$-decay of heavy nuclei taking into account the angle
between the directions of $\alpha$-particle motion (or its tunneling) and
photon emission is presented. The angular bremsstrahlung spectra for
$^{210}{Po}$ have been obtained for the first time. According to calculations,
the bremsstrahlung in the $\alpha$-decay of this nucleus depends extremely
weakly on the angle. Taking into account nuclear forces, such dependence is not
changed visibly. An analytical formula of the angular dependence of the
bremsstrahlung spectra is proposed and gives its harmonic behavior. The
extremal values of the angle, at which the bremsstrahlung has maximal and
minimal values, has been found.
