- GACRUX (Gamma Crucis). In our “western” star lore, the stars with proper names come from the set that could be seen from the lands of the ancient middle east and Arabia, and do not include those of the far southern hemisphere, which is largely invisible below the horizon from northern lands. Yet those who needed the stars to find their way, the old navigators, also needed quick names for some of the stars and just made them up. “Gacrux” is a prime example of such a star, its name deriving strictly from its Greek letter name, Gamma Crucis, the third-brightest star in the constellation Crux, the Southern Cross.
- Warp and weft (Wikipedia)
In the manufacture of cloth, warp and weft are the two basic components in weaving to transform thread and yarn into textile fabrics. The vertical warp yarns are held stationary in tension on a loom (frame) while the horizontal weft (also the woof) is drawn through (inserted) over and under the warp thread. In the terminology of weaving, each warp thread is called a warp end; a pick is a single weft thread that crosses the warp thread, synonymous terms are fill yarn and filling yarn.