On your left as you face west, near the south point of the horizon, is galactic longitude 270[degrees].
Because in this direction we look toward about galactic longitude 240[degrees], NGC 2362 can be thought of as "following" the Canis Major Association in terms of galactic rotation.
Its course is clear in the neighborhood of the Sun, and it extends forward (in terms of galactic rotation) to the Cygnus Star Cloud, which lies between galactic longitudes 60[degrees] and 80[degrees].
But we look at a puzzle in the opposite direction, between galactic longitudes 240[degrees] and 260[degrees] in Puppis, Pyxis, western Vela, and western Carina.
For observers in the North Temperate Zone, galactic longitude 90[degrees] is nearly straight overhead during early autumn evenings.
Note that these three nearby associations lie at or beyond galactic longitude 90[degrees], the direction of orbital motion of our neighborhood of the galaxy, whereas the more distant Cygnus Star Cloud, where we look down the forward arc of the Orion Cygnus Arm, is between galactic longitudes 80[degrees] and 60[degrees]--in other words, a bit toward the interior of the galaxy.
To get a better perspective on this, look up toward Deneb, in the direction of galactic longitude 90[degrees].
When we look toward galactic longitudes between 0[degrees] and 90[degrees], we're also looking the direction where our spiral inward toward the center.
When we look toward galactic longitude
180[degrees], between Auriga and Gemini, we're looking directly away from the galactic center.
Just past Deneb close to the North America Nebula we reach 90 [degrees] galactic longitude
HEAO-1 did find similar ridgelike emissions along the galactic plane at galactic longitudes
greater than 50[deg.
01 square degree between galactic longitudes
240[degrees] and 360[degrees], they found that only 1.