â¢ Single Land Owner. The Scott AFB (St. Clair) Site is currently owned by a single land owner (St. Clair County) and is available to the NGA immediately at no cost. All other sites are owned by private entities, have associated significant costs, and some have no interest in selling their property to the NGA.
The parsec (symbol: pc) is a unit of length used to measure large distances to objects outside the Solar System. One parsec is the distance at which one astronomical unit subtends an angle of one arcsecond. A parsec is equal to about 3.26 light-years (31 trillion kilometres or 19 trillion miles) in length. The nearest star, Proxima Centauri, is about 1.3 parsecs (4.2 light-years) from the Sun. Most of the stars visible to the unaided eye in the nighttime sky are within 500 parsecs of the Sun.
Convert to. 1 parsec (pc) = 206,264.81 astronomical units (au) Specific parsec to astronomical unit Conversion Results. Enter a New parsec Amount to Convert From. * Whole number, decimal or fraction ie: 6, 5.33, 17 3/8. * Precision is how many digits after decimal point 1 - 9.