Matching the tattoos on Tom's back to the celestial map and aligning them to the 5 stars in the celestial map taken from the pillar's design proves to be a perfect fit. However, the squares on Tom's tattoos don't match anything on the celestial map. Ed runs a celestial cycle program showing different variation of this exact night sky 100 years back and forwards. Through the simulation, Sloan finds a comment that will pass by earth again on October 1998. They realize the date is significant but they don't know what it signifies.