Simple categories matching extragalactic:

• system,
• topic,
• phenomenon,
• object,

Members with property extragalactic:

• quasar,
• active_galaxy,
• black_hole,
• remote_galaxy,
• galaxy,
• individual_galaxy,
• cluster,
• nebula,
• dark,
• active_nucleus,
• radio_galaxy,
• star_death,
• pulsar,
• normal_spiral,