Observatory Quest

Monsters in dungeon

 * Goblin (lvl 19)
 * Dungeon rat (lvl 16)
 * Dungeon spider (lvl 22, poisonous)

Guide
Talk to the Observatory Professor. He tells you that the Goblin residents have been causing trouble and tampered with his telescope. He asks you to collect 3 different items.

Lens mould: Go down the ladder in the Observatory post, into dungeon. Go through the maze to the far south west corner and you find a chest containing a key. Go to the room where a level 48 goblin guard is, kill him and use key on the gate. Search the sacks to find lens mould.

Go back to the Observatory post and give the lens mould to the Professor. Agree to help him make the lens. Use molten glass on the lens mould and then talk to the Professor and he will tell you to him in the Observatory.

Go back down to the dungeon, and through the maze, and find another ladder north of the chest containing the key to the gate. It leads to the Observatory. Talk to Professor and he rewards you.

Optional:
Speak to the assistant there and he will give you a jug of wine. Look into telescope again and you will see a strange symbol. Speak to the Spirit of Scorpius, at the graveyard to the north. He will give you an Unholy Symbol Mould, which you can use to make Unholy Symbols of Zamorak. If he is asked, he will bless these symbols.

Rewards

 * 2 Quest Points
 * Crafting experience
 * depends on which constellation you pick.
 * Aqarius: 25 water-runes
 * Aries: Attack experience
 * Cancer: Emerald Amulet of Protection
 * Capricorn: Strength experience
 * Gemini: Black 2-handed Sword
 * Leo: Hits experience
 * Libra: 3 law-runes
 * Pisces: 3 Tuna
 * Saggittarius: Maple Longbow
 * Scorpio: Weapon Poison
 * Taurus: Super Strength Potion