Metric

Distance & Velocity Metrics (Astronomic)

• G-Hour
• Light Speed (c)

» The Imperial Standard Value of Lightspeed (c) is defined by convention as exactly 3.0 x 10⁸ Imperial standard meters per second.

• The Imperial standard meter (m) is defined by convention as exactly one-300-millionth the distance light travels in one second.

• Astronomical Unit (AU)

» The Imperial Standard Astronomical Unit (AU) is defined by convention as:

»» Exactly 150,000,000 Imperial standard kilometers (km)

• Light-velocity distances:

• light-second (ls)
• light-minute (lm)
• light-hour (ls)
• light-day (ls)
• Light-week (lw)
• Light-year (ly)

• Parsec (pc)

» The Old Terran Standard Parsec was based on orbital parallax distances and angular measures in the Sol system, and was standardized as a distance of 3.26 ly (≈ 3¼ ly).

» The Ancient Vilani Deshi was based on the separation between Vland and Tauri, yielding a distance of ≈ 2.17 ly (≈ 2¹/₆ ly).

» The Imperial Standard Parsec (pc) includes: is defined by convention as:

»» The Imperial Standard Metric Parsec:

• Exactly 200,000 Imperial Standard AUs

• Exactly 500 light-seconds (ls)

• A distance of approximately 3.171 ly (≈ 3¹/₆ ly).

»» The Imperial Standard Angular Parsec:

• A distance of exactly pi (π) ly.

• A distance of approximately 3.142 ly (≈ 3¹/₇ ly).