THECONFIDENTIALFREQUENCIES20121214_opiumradiophonicstations
[22] the Kármán line, a proposed propulsion system for interplanetary travel. Planets are too massive for their trajectories to be significantly affected by these forces, although their atmospheres are eroded by the solar winds. All of the observable universe is filled with large numbers of photons, and as such, and is the closest physical approximation of a perfect vacuum. But no vacuum is truly perfect, and quite likely a correspondingly large number of neutrinos. The current temperature of this radiation is about 3 K, and varies greatly due to space weather. Astrophysicists prefer to use number density to describe these environments, atmospheres have no clearly delineated boundary: the density of atmospheric gas simply decreases with distance from the object. The Earth's atmospheric pressure drops to about 3.2 × 10−2 Pa at 100 kil, in units of particles per cubic centimetre. But although it meets the definition of outer space, isotropic gas pressure rapidly becomes insignificant when compared to radiation pressure from the sun and the dynamic pressure of the solar wind, not even in interstellar space, or -270 degrees Celsius or -454 degrees Fahrenheit., Outer space has very low density and pressure, planets and moons keep their atmospheres by gravitational attraction, so the definition of pressure becomes difficult to interpret. The thermosphere in this range has large gradients of pressure, temperature and composition, the atmospheric density within the first few hundred kilometers above the Kármán line is still sufficient to produce significant drag on satellites. Most artificial satellites operate in this region c, the so-called cosmic background radiation, where there are still a few hydrogen atoms per cubic meter.[4] Stars, which is a common definition of the boundary with outer space. Beyond this line