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Star Trek travel unit: Abbr., 4 letters
5.88 trillion miles, roughly (abbr.), 4 letters
63,000 AU, approximately, 4 letters
About 10 trillion kil., 4 letters
About 5.88 trillion mi., 4 letters
About 6 trillion mi., 4 letters
About 9.46 trillion km, 4 letters
About six trillion mi., 4 letters
About three-tenths of a parsec: Abbr., 4 letters
Astron. measurement, 4 letters
Astronomical distance meas., 4 letters
Astronomical distance: Abbr., 4 letters
Galactic distance unit: Abbr., 4 letters
Interplanetary dist., 4 letters
Interstellar distance: abbr., 4 letters
One of 3.26 in a parsec (abbr.), 4 letters
Roughly six trillion mi., 4 letters
A very long distance (abbr.), 5 letters
Dist. between stars, 5 letters
Interstellar dists., 5 letters
Long distances, for short, 5 letters