Players can find all six Broken Stars across landmarks like Terrapin, Roslit Bay, Ancient Isle, Snowcap, Moosewood & Mushgrove Swamp. This is part of Brayden's Star Projector Anomaly Investigation.
If you have taken the Brayden's Star Projector quest as part of your Anomaly Investigation for the main Telescope task, you must find six different Broken Star pieces across the map to repair the star projector. So, if you have found a few and are looking for the rest, here is a detailed guide.
Where are the Six Broken Star Locations in Fisch?
Below are all the Six Broken Star Locations in Fisch and the fastest way to reach them.
Broken Star Location 1

The first Broken Star is located on Terrapin Island at GPS (124, 200, 1978). It's at the top of the island on the right side. Use an Advanced Glider or Gravity Coil to get to the top easily.
Broken Star Location 2

The next Broken Star is on top of the Roslit Bay Volcano at GPS (-2001,190, 389). Slowly make your way around the mountain using your Advanced Glider and reach the top, where you can find it on a cliff right below the Volcano at the top.
Broken Star Location 3

For the third Broken Star, you must go to the Mushgrove Swamp. After reaching the island, walk towards the left side to find a small watchtower building with the Guard sleeping in the chair. Go behind him to find the Broken Star at GPS (2519, 156, -921), as shown in the image above.
Broken Star Location 4

The next one is at Ancient Isle. Hop on your boat and travel straight to the island marker. On reaching the island, go towards the left side and climb to the topmost part of the island until you reach the tent area. Look behind the tent to find a Broken Star in a Corner at GPS (6142, 391, 657).
Broken Star Location 5

The next one requires you to travel to the Snowy Biome of Snowcap Island. Here, climb to the top of the island to find a large Icicle at the center. Look at the bottom of this Icicle to find a Broken Star next to a tree.
Broken Star Location 6

This is the easiest one, as it's located at Moosewood. After spawning on the island, go towards the back to find the lighthouse. Climb the lighthouse to reach the top, where you can find the last Broken Star next to the wooden railing.
For more on Fisch, check out Fisch Chapel Guide - Location, Rod Skin Quest & more or Complete Roaming Fish & Spear Hunting Guide - Fisch