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This quest has a quick guide found here. It briefly summarises the steps needed to complete the quest.
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Details[]
| Start point |  Talk to the Observatory professor in the Observatory Reception Room south-west of Ardougne, north of Castle Wars.
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| Official difficulty | Novice |
| Description | The Observatory in south-west Ardougne has been ransacked by a family of nearby goblins. Can you help the professor to rebuild it? |
| Length | Short – Medium |
| Requirements |
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| Items required |
Recommended:
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| Enemies to defeat | Goblin guard (level 42) (Optional - can simply be trapped behind a column) |
Getting started[]
The start of the quest.
Items required: 3 regular planks, a bronze bar, molten glass
Speak with the Observatory professor, located in the reception room of the Observatory (near the Observatory tower). Ask if you can look through the telescope and he says that it's broken. He tells you that a family of goblins has tampered with the telescope, so ask if you can help. He says that he needs some wood for the tripod, bronze for the tube, and glass for a new lens.
Once you have these three items, bring them back to the professor who will take them from you. He then says that he needs a mould so that he can make a new lens.
- Note: Make sure to talk to the professor three times and give him the molten glass, bronze bar and three planks before attempting to inspect the stove; otherwise, you will have to lure or kill the guard again for the key.
Retrieving the lens mould[]
Items required: None.
Recommended: An antipoison potion, energy potions, combat equipment (for lower levels) and food
The stairs (red). The superantipoison (green).
If you don't have antipoison potions, you can pick up one Superantipoison at the spawn in the southeastern building. Go down the stairs to the east of the reception room to find the Observatory Dungeon (the room with the stairs is directly east of the start point).
A map of the Observatory Dungeon.
Once down the stairs, you must find the goblin kitchen key. It is commonly found in the south-eastern most chest although it can vary from person to person. Search any chests you pass on the way to the south-eastern chest just in case. Keep searching the chests (refer to the map) until you find the key. Be sure and click "continue" on the dialogue box or the key will not be added to your inventory.
Sometimes there may be a poisonous spider inside the chest in which case run away quickly or you may get poisoned. There is also a chest north-east of the stairs to the Observatory, which spawns infinite Antipoison(1) vials, which you can combine to make full vials. Consider using this moment to create yourself a stock for future use.
Now that you've got the key, head all the way back to the kitchen gate that you may have passed (take the northeastern path from entrance), and "prod" the sleeping guard. He will wake up and attack you. You can either defeat him or get him stuck behind a wall.
- Note: Getting him stuck behind a wall will allow you to go through the door. However, if you pass the goblin again, you will be attacked. Also, another goblin will spawn asleep. You can fight multiple goblins.
Open the kitchen gate (you will use the key and discard it), and then inspect the goblin stove. You determine the goblins are cooking something foul in the lens mould. Dump out the stew and bring this back to the professor.
His assistant will ask you not to give it to him, as last time the professor attempted to craft something, the explosion took a week to clean up. The professor agrees and gives you back the molten glass and mould.
Use the molten glass with the lens mould to craft him a new lens. Give it back to the professor. He will want you to visit him in the Observatory.
The Observatory[]
The Observatory.
Items required: None.
Climb back down the stairs into the maze. Now, instead of taking the south-east path, follow the north-west passage (past the kitchen) to find some stairs leading to the Observatory. A cutscene will play. After the cutscene ends, go up the stairs and talk to the professor, and then "view" the telescope to see a constellation.
Looking through the telescope.
After closing the window, the professor should ask you which constellation you saw. The constellations are on wall charts in the main level of the Observatory. Identify your constellation, talk to the professor again, and you should get your reward in your backpack.
Congratulations! Quest complete!
| Name & Reward | Picture | Name & Reward | Picture |
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| Aquarius 25 Water runes, uncut sapphire |
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Aries 875 Attack experience, uncut sapphire |
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| Cancer Amulet of defence, uncut sapphire |
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Capricorn 875 Strength experience, uncut sapphire |
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| Gemini Black 2h sword, uncut sapphire |
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Leo 875 Hitpoints experience, uncut sapphire |
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| Libra 3 Law runes, uncut sapphire |
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Pisces 3 Tuna, uncut sapphire |
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| Sagittarius Maple longbow, uncut sapphire |
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Scorpio Weapon poison, uncut sapphire |
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| Taurus Super strength(1), uncut sapphire |
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Virgo 875 Defence experience, uncut sapphire |
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Rewards[]
- 2
Quest points - 2,250 Crafting experience
- Your item reward depends on what astrological sign you see when you look through the Telescope. It is also different for each person. You will get one of these:
- A maple longbow
- Weapon poison
- 3 Law runes
- An amulet of defence
- A black 2h sword
- A 1-dose super strength potion
- 25 Water runes
- 3 Tuna
- An uncut sapphire
- 875 Experience in Attack, Defence, Hitpoints, or Strength (random)
- The Spirit of Scorpius will now give you a mould to make Unholy symbols, and he will bless them for you too (but only after speaking to the assistant *after* completion of the quest). He can be found in the graveyard north of the Observatory.
- Access to the grappling shortcut rock outside the Observatory
Trivia[]
- If the player talks to the Observatory assistant after the quest, he will give the player a jug of wine as thanks for the help. He will also tell the player his and the professor's real names, which are Patrick and Mamo-duna-roona, respectively
Observatory Quest | |||||
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