When you acquire Orrery at Act 1, Orrery offers you no upgraded cards (Except for when you have Molten Egg, Toxic Egg or Frozen Egg). When it's Act 2, Orrery's card drops all have a 25% chance of being upgraded like the rest of the card rewards in Act 2.
Patch V2.0: The Watcher
Orrery relic rarity changed from Boss -> Shop.
Weekly Patch 4: Full speed ahead!
Orrery is a boss relic again.
Weekly Patch 3: Balance Balance Balance
HOTFIX: Orrery is temporarily removed because it crashes.