Originally a DLC quest, this quest is now integrated into the base game. You can find and talk with Bothiel to see about restoring the Arcane University’s Orrery. You get a note from her asking for help to do so.

Walkthrough

Talk to Bothiel

Bothiel can commonly be found in the base of the Arch-Mage’s Tower at the Arcane University. Otherwise, she will be in the Mages Quarters of the Arcane University, asleep.

Approach and talk with her about the “Orrery.” She will give you a list of items to retrieve, 4 total.

Collect the Artifacts

Camp Ales

This is the camp that you will know about first. It’s found up in the mountains North of Kvatch. It’s found on the mountainside a good ways up. Once there, you will need to find and defeat the Bandit Carrier. They hold the note you need, the “Undelivered Letter” as well as the first of the “Dwarven Cogs.” Reading the letter will provide the locations of the 4 other camps that have the stolen pieces of the Orrery.

Bodean Camp – Dwarven Cylinder

This camp is found to the West of Camp Ale, past the Brittlerock Cave. It’s a sparse camp with only a bandit or two, maybe a wolf, and the Bandit Carrier.

Brotch Camp – Dwarven Cog

This camp is found to the Northeast of Camp Ale. You will need to find and kill the Bandit Courier to get he Dwarven Cog that they possess. The Carrier is marked, not the camp location. This can be very helpful to find them if they’re not in the Camp itself.

Dagny’s Camp – Dwarven Coherer

This camp is found to the East of Camp Ale. South of Brotch Camp. There are only a few bandits here with its tent or two and the Bandit Carrier

Varus Camp – Dwarven Tube

This camp is found to the West of Camp Ale. It’s found past Fort Hastrel. There are a few bandits where with the Bandit Carrier.

Repair the Orrery

Bothiel can be found in the Arch-Mage’s Tower. Just turn over the Dwarven parts to her. It will take Bothiel 24 hours to effect the repairs for the Orrery.

Activate the Orrery

Getting inside the Orrery, go through the Southeastern Door within the Arch-Mage’s Tower. Open the Dwarven hatch after that. Go up either set of stairs to the Imperial Orrery Console. Interact with it, and you will receive the Major Power that is presently active.

Orrery Powers

Once you’ve seen to the repairs of the Orrery, you will now be able to get a Greater Power from it. What that power is changes every 3 days with the phases of the Moons.

Video Walkthrough