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(110–210 Earth radii) 6.36×10 6 –1.27×10 7: The space dominated by Earth's magnetic field and its magnetotail, shaped by the solar wind. [17] Earth's orbit: 299.2 million km [b] 2 AU [c] 2.99×10 8: The average diameter of the orbit of the Earth relative to the Sun. Encompasses the Sun, Mercury and Venus. [18] Inner Solar System ~6.54 AU ...
Standard Gauge, also known as wide gauge, was an early model railway and toy train rail gauge, introduced in the United States in 1906 by Lionel Corporation. [1] As it was a toy standard, rather than a scale modeling standard, the actual scale of Standard Gauge locomotives and rolling stock varied.
Originally like most other train manufacturers, Bachmann's train sets used conventional snap-track (originally in brass, then switching to steel in the early 1980s.) In 1994, Bachmann introduced the then-revolutionary E-Z track, that featured HO track built onto a moulded plastic roadbed that could be assembled like typical HO track.
Selectrix is an early digital model train command control system developed by German company Döhler & Haas for model railway manufacturer Trix in the early 1980s. Since 1999 Selectrix is an open system supported by several manufacturers and standardized by MOROP.
The Earth-centered, Earth-fixed coordinate system (acronym ECEF), also known as the geocentric coordinate system, is a cartesian spatial reference system that represents locations in the vicinity of the Earth (including its surface, interior, atmosphere, and surrounding outer space) as X, Y, and Z measurements from its center of mass.
The "globe", in the DGG concept, has no strict semantics, but in geodesy a so-called "grid reference system" is a grid that divides space with precise positions relative to a datum, that is an approximated a "standard model of the Geoid". So, in the role of Geoid, the "globe" covered by a DGG can be any of the following objects:
The Orion Arm, also known as the Orion–Cygnus Arm, is a minor spiral arm within the Milky Way Galaxy spanning 3,500 light-years (1,100 parsecs) in width and extending roughly 20,000 light-years (6,100 parsecs) in length. [2] This galactic structure encompasses the Solar System, including Earth.
Model trains and accessories Bowser Manufacturing is a United States manufacturer of model railroad equipment, located in Montoursville, Pennsylvania . Founded in 1946 by Bill Bowser in Redlands, California, he used his skill as a machinist to design and produce one of the first lines of accurately scaled steam locomotive kits in HO scale .