They Belong in a Museum

They Belong in a Museum is an achievement in The Long Journey Home.

It is a visible achievement in the Artifacts category and its progress is actively displayed in the main menu. It is granted for finding all of the galaxy's relics.

Requirements
The choice of items might not be obvious to everybody. Here is the complete list of all 33 objects.

Ancient relics
The anonymous ancient relics can be found in Tchansu ruins.

Avulco relics
The Avulco relics are obtained in Avulco ruins.

Bones of P'tah
The bones of P'tah are hidden in biotopes.

Maylaa relics
The Dreamweaver and the Suspended Galaxy are found in Maylaa ruins. To obtain the Crystallized Time, one has to free a Trapped Wisp at a Maylaa ruin. Trapped Wisps can be extracted from Ticking Devices by Lebedev and Ticking Devices can be found in wrecks.

Tchansu totems
All necessary Tchansu totems can be found in Tchansu ruins.

Xaquindi relics
All required Xaquindi relics can be found in Xaquindi ruins.

Quest related relics
The Idol of Many Feats can be obtained during the Chemtrails in the Sky, or The Unusual Suspects quests.

Cueddhaest
The Astrolabe, The Compass, and The Sextant can be found in ruins in every Cueddhaest seed and are connected to the Tomb Raider quest and its follow up the Everybody's Going To The Rapture. The Orb of Dark Places is obtained during the welcome quest: Missionary Down.

Wolphax
The Compass is present in each Wolphax seed, but hidden on a single planet of the galaxy. With Siobhan the Compass can be used to start the Avalon quest and to obtain Gamuhvane.