Astrometry and celestial mechanics
What measurement charts the movement of systems across the Milky Way?
Astronomy
Milky Way (mythology) Astronomy Parsec Austrian units of measurement Milky Way (mythology)
Milky_Way_(mythology)-Abstract Astronomy-Astrometry_and_celestial_mechanics Parsec-Parsecs_and_kiloparsecs Austrian_units_of_measurement-Abstract Milky_Way_(mythology)-Armenian
There are many myths and legends about the origin of the Milky Way, the crowd of stars that makes a distinctive bright streak across the night sky. 
One of the oldest fields in astronomy, and in all of science, is the measurement of the positions of celestial objects. Historically, accurate knowledge of the positions of the Sun, Moon, planets and stars has been essential in celestial navigation (the use of celestial objects to guide navigation) and in the making of calendars. Careful measurement of the positions of the planets has led to a solid understanding of gravitational perturbations, and an ability to determine past and future positions of the planets with great accuracy, a field known as celestial mechanics. More recently the tracking of near-Earth objects will allow for predictions of close encounters, and potential collisions, with the Earth. The measurement of stellar parallax of nearby stars provides a fundamental baseline in the cosmic distance ladder that is used to measure the scale of the universe. Parallax measurements of nearby stars provide an absolute baseline for the properties of more distant stars, as their properties can be compared. Measurements of radial velocity and proper motion plot the movement of these systems through the Milky Way galaxy. Astrometric results are the basis used to calculate the distribution of dark matter in the galaxy. During the 1990s, the measurement of the stellar wobble of nearby stars was used to detect large extrasolar planets orbiting nearby stars.
s and kiloparsecs. Distances expressed in "parsecs" (pc) include distances between nearby stars, such as those in the same spiral arm or globular cluster. A distance of parsecs ( light-years) is commonly denoted by the "kiloparsec" (kpc). Astronomers typically use kiloparsecs to express distances between parts of a galaxy, or within groups of galaxies. So, for example:  One parsec is approximately 3.26 light-years. The nearest known star to the Earth, other than the Sun, Proxima Centauri, is 1.30 parsecs (4.24 light-years) away, by direct parallax measurement. The distance to the open cluster Pleiades is 130 ± 10 pc (420 ± 32.6 light-years) from us, per Hipparcos parallax measurement. The center of the Milky Way is more than 8 kiloparsecs () from the Earth, and the Milky Way is roughly 34 kpc () across. The Andromeda Galaxy (M31) is ~780 kpc (~2.5 million light-years) away from the Earth.  
The following are old systems of measurement in Austria. 
Mythology among cultures. Ancient Armenian mythology called the Milky Way the "Straw Thief's Way". According to legend, the god Vahagn stole some straw from the Assyrian king Barsham and brought it to Armenia during a cold winter. When he fled across the heavens, he spilled some of the straw along the way. 