What are basic characteristics of stars' orbits in the disk, halo, and bulge of our galaxy? what are basic characteristics of stars' orbits in the disk, halo, and bulge of our galaxy? the disk stars have nearly circular orbits. they have vertical motions out of the plane, making them appear to bob up and down, but they never get "too far" from the disk. orbits of stars in the bulge and the halo of the galaxy are much less orderly, traveling around the galactic center on elliptical orbits with more or less random orientations. the halo stars have nearly circular orbits. they have vertical motions out of the plane, making them appear to bob up and down, but they never get "too far" from the halo. orbits of stars in the bulge and the disk of the galaxy are much less orderly, traveling around the galactic center on elliptical orbits with more or less random orientations. the bulge stars have nearly circular orbits. they have vertical motions out of the plane, making them appear to bob up and down, but they never get "too far" from the bulge. orbits of stars in the disk and the halo of the galaxy are much less orderly, traveling around the galactic center on elliptical orbits with more or less random orientations?