Ebony / Pink Ivory inlay - Constellation artwork

This is inlay work on a large hard-maple surface corner desk I built for an observatory not far from where I live.  Just a small section is shown in the photo.  Desk has inlays for 36 constellations and about 1500 stars in ebony of various sizes according to magnitude or brightness. Used pink ivory for the constellation stick-figures.  Yellow dots represent open and globular star clusters and green is for planetary nebulae.  For the artwork, a swath was taken through the sky at 17.5 hrs. celestial longitude including the north and south celestial poles.  This longitude includes Scorpius (scorpion) and Sagittarius (teapot) which are normally seen during the summer months.  The two vertical dotted lines are the plane of the ecliptic (path the sun follows through the sky) to the right, and the celestial equator to the left (0 degrees celestial latitude).  The slanted line at 2:00 to 4:00 is the galactic equator with a black "X" in the center which marks the Sgr A* compact radio source - the supermassive black-hole that resides at the center of our Milky Way galaxy.