Rather than thinking of electrons as discrete particles orbiting around the nucleus, it may be useful to think of them as being a 'smear' that's distributed all around the nucleus all at once.

A particle orbiting such a field line will find itself near the outside of the confinement area at some times, and near the inside at others.

Its effects include a drag on small particles orbiting Uranus, causing a general depletion of dust in the Uranian rings.

Isn't it amazing how we can find 28 atomic particles orbiting our planet, little microscopic antimatter atoms, but yet we can't discover a cure for cancer or other diseases.

Perhaps these antimatter particles orbiting Earth's magnetic field can be useful to power relativistic space drive for an interstellar journey toward Alpha Centauri and beyond.

A particle orbiting in the Schwarzschild metric can have a stable circular orbit with .

Configurations of classical charged particles orbiting one another are unstable due to losses of energy by electromagnetic radiation.

This equation, along with the geodesic equation have motivated by the kinetics and dynamics of a particle orbiting the earth in a circular orbit.

A planetary ring is a ring of cosmic dust and other small particles orbiting around a planet in a flat disc-shaped region.

Interestingly, particles orbiting in opposite directions experience gravitomagnetic corrections T with opposite signs, so that the difference of their orbital periods would cancel the standard Keplerian terms and would add the gravitomagnetic ones.