Tag: Astrophysics

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  • Frost line

    _In astronomy or planetary science, the frost line, also known as the snow line or ice line is distance in the solar nebula from the central protostar where it is cool enough for hydrogen compounds such as water, ammonia, and methane to condense into …

  • Exijan Designation

    h1. Exijan Designation [[File:439329 | class=media-item-align-right | Astrogation_2.jpg]] __The Exijan Designation From Core Inertial Frame Reference Protocol (ED-P) or Exijan Designation for short, is a quasi-inertial reference frame centered at …

  • parsecs

    h1. Parsec [[File:440541 | class=media-item-align-right | Stellarparallax_parsec1.jpg]] A parsec (symbol: pc) is a unit of length used to measure the astronomically large distances to objects outside of a Star System, and is the largest unit of …