At about 7:30 tonight, i was walking up the outdoor stairs to my front door, and i looked east and saw a sphere with a small line on the top over the 4-story apartment building that's on the property next door. the sphere was navy blue, and the line was white. the white line had a mark sort of like an hourglass. the object was swaying back and forth, and it was moving in a straight line toward the south-east. it looked like it was slowing down and speeding up. at first glance i thought it was a plane, but after a few seconds, i saw that it was much closer and moving much differently than an airplane. when i realized that it wasn't an airplane, i was frightened and i came into the house. it was about 20 seconds between the time i first saw the object and the time i went into the house.