Pyrene has been tentatively identified in the interstellar medium. Use Huckel Rule to determine is pyrene is aromatic or antiaromatic (assuming planarity of the π system).

Pyrene

A polycyclic aromatic hydrocarbon (PAH) consisting of four fused benzene rings, resulting in a flat aromatic system.

Huckel Rule

A rule that helps predict the aromaticity of planar rings based on the count of pi electrons, stating that aromatic compounds must have 4n+2 pi electrons.

Aromatic

Refers to molecules that contain one or more planar rings of atoms with delocalized pi electron systems, typically associated with increased stability.