<P> Geospace is populated by electrically charged particles at very low densities, the motions of which are controlled by the Earth's magnetic field . These plasmas form a medium from which storm - like disturbances powered by the solar wind can drive electrical currents into the Earth's upper atmosphere . Geomagnetic storms can disturb two regions of geospace, the radiation belts and the ionosphere . These storms increase fluxes of energetic electrons that can permanently damage satellite electronics, interfering with shortwave radio communication and GPS location and timing . Magnetic storms can also be a hazard to astronauts, even in low Earth orbit . They also create aurorae seen at high latitudes in an oval surrounding the geomagnetic poles . </P> <P> Although it meets the definition of outer space, the atmospheric density within the first few hundred kilometers above the Kármán line is still sufficient to produce significant drag on satellites . This region contains material left over from previous manned and unmanned launches that are a potential hazard to spacecraft . Some of this debris re-enters Earth's atmosphere periodically . </P> <P> Earth's gravity reaches out far past the Van Allen radiation belts and keeps the Moon in orbit at an average distance of 384,403 km (238,857 mi). The region outside Earth's atmosphere and extending out to just beyond the Moon's orbit, including the Lagrangian points, is sometimes referred to as cis - lunar space . By consensus, any region beyond cislunar space is referred to as deep space . The region of space where the gravity of the Earth remains dominant against gravitational perturbations from the Sun is called the Hill sphere . This extends well out into translunar space to a distance of roughly 1% of the mean distance from the Earth to the Sun, or 1.5 million km (0.93 million mi). </P> <P> Interplanetary space is defined by the solar wind, a continuous stream of charged particles emanating from the Sun that creates a very tenuous atmosphere (the heliosphere) for billions of kilometers into space . This wind has a particle density of 5--10 protons / cm and is moving at a velocity of 350--400 km / s (780,000--890,000 mph). Interplanetary space extends out to the heliopause where the influence of the galactic environment starts to dominate over the magnetic field and particle flux from the Sun . The distance and strength of the heliopause varies depending on the activity level of the solar wind . </P>

How many miles until you are out of the earth's atmosphere