This small asteroid (or comet) passed under Earth's orbit on October 14 at about 60 times the moon's distance. Now it appears to be heading toward interstellar space again.
Cosmologists are heading back to their chalkboards, as experiments designed to figure out what this unknown 84% of our universe actually is, come up empty.
Once the moon leaves the evening sky, starting at the end of the first week of November, try locating Neptune in front of the constellation Aquarius, and near the star Lambda Aquarii.
