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Observatory Quest

IntermediateMembersShort

OSRS TCG Observatory Quest — Old School RuneScape quest card mapping

Start: talk to Observatory professor.

The Observatory in south-west Ardougne has been ransacked by a family of nearby goblins. Can you help the professor to rebuild it?

Observatory Quest is a members Old School RuneScape quest rated Intermediate. The OSRS TCG Observatory Quest card list covers 4 of the items and monsters involved, including Plank, Bronze bar and Molten glass. This page pairs the quest with those cards and with the open player trades for them; the OSRS Wiki remains the authority on requirements and the walkthrough itself.

Full quest guide on the OSRS Wiki →

Beta: quest cards are matched to the best of our current knowledge and may include some mismatches — we're still working through the data. If something doesn't look right, please submit feedback.

The quest and minigame card relationships on this page are maintained by OSRS Card Exchange. Whether a related item or monster currently appears as a card, and its displayed OSRS TCG rarity, are legacy compatibility fields derived from the referenced OSRS TCG catalogue snapshot. OSRS Card Exchange is independently operated and is not affiliated with or endorsed by OSRS TCG or its developers. View OSRS TCG attribution and licence information.

Required items & monsters

Items you need to bring and the monsters you'll fight, paired with their OSRS TCG cards. See the wiki for the full requirement list.

Plank

Plank

Resource

A plank of wood!

1 gpCommon

Bronze bar

Bronze bar

Resource

It's a bar of bronze.

8 gpCommon

Molten glass

Molten glass

Resource

Hot glass ready to be blown into useful objects.

3 gpCommon

Monsters you'll fight

Goblin guard

Goblin guard

Monster • Kandarin

Sleeping like an ugly baby.

Lvl 1Common

Walkthrough overview

A brief summary of the quest, noting where each card is used. The OSRS Wiki has the full, authoritative walkthrough.

  1. 1

    Talk to the Observatory professor north of Castle Wars and give him three planks, a bronze bar and molten glass to repair the telescope.

    • Plank
    • Bronze bar
    • Molten glass
  2. 2

    Go down the eastern stairs into the Observatory Dungeon and search chests to find the goblin kitchen key.

  3. 3

    Prod the sleeping goblin guard (kill it or trap it behind a wall), pass through the kitchen gate and retrieve the stolen lens mould.

  4. 4

    Return the mould to the professor, then climb to the Observatory and view the telescope.

  5. 5

    Tell the professor which constellation you saw to complete the quest.

Open exchanges for these cards

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OSRS TCG Observatory Quest — frequently asked

Which OSRS TCG cards are linked to Observatory Quest?
4 catalogue cards map to Observatory Quest: Plank, Bronze bar, Molten glass and Goblin guard. They are the quest's items and the monsters you fight that exist as cards in the Old School RuneScape TCG. The mapping is maintained by OSRS Card Exchange; whether something is a card, and its rarity, come from the OSRS TCG catalogue.
Is Observatory Quest members only?
Yes, Observatory Quest is a members quest. It is rated Intermediate.
What is the rarest card from Observatory Quest?
Plank at Common, which packs land on about 37.34% of the time. Rarity comes from the card's OSRS TCG score, not from the quest.
How do I get the OSRS TCG Observatory Quest cards?
Pull them from packs in the OSRS TCG RuneLite plugin, or trade for them. Open exchanges for this quest's cards are listed further down this page, and the trade itself happens in the plugin's own Trade window in game.
Does this page tell me how to complete Observatory Quest?
It gives a brief walkthrough overview and maps the quest to its OSRS TCG cards — the items and monsters involved, and who is trading them. For the complete requirements, detailed steps and rewards, the OSRS Wiki link on this page is the authority.

Related cards

Cards that come up around Observatory Quest but that you don't actually need for it — NPCs mentioned in passing, scenery, or items suggested only for convenience.