The flux path that Flamewall mentions is referenced by a message on 60, 156, Planet 1, (the Humna Humna tell you this). The message gives you the exact planetary coordinates, which are useful:

Quote:
" have discovered a continuum flux path that leads from the Halls of Memory to the anomaly few have attempted escape through the anomaly. Unknown if have been successful.
Not long before Last of us will be forced to choose between suicide or psychic domination We are lost Gave key to the guardian satellite to the Dweenle perhaps some day, if any of us have survived rebuild our civilization.
last stronghold at the Halls of Memory, located at 26S X 135E preparing for death hope despair"


The bigger puzzle though is to locate which system the Halls of Memory are in. Gorzek starts you out in the right direction once you return the Most Valuable Thing to the Tandelou. (Gorzek, The Tandelou, Spemin, G'Nunk, and Humna Humna can all give you clues on how return the MVT). Once the MVT is returned and the Tandelou civil war is over, Gorzek can tell you where Elthesh is:

Quote:
"Addendum to chronological data element no. 7, topic- impending genocide of Lowarian race. Lowar established center for study of Leghk technology on planet Elthesh- planet 4, system coordinates- 84 X 176, planetary location- in vicinity of highest point on largest island."


On "Elthesh", at 28N*45E, you get the message:

Quote:
" have discovered that there exists a place built by the Leghk, and referred to them as the Halls of Memory. This, we have determined, was the repository of all the cumulative learning of the ancient Leghk civilization. If only we could find it, perhaps we could find answers there that might save us. We know that their plasma bolt weaponry and shielding were far superior to ours. We know that the halls are located somewhere near the coordinates 30S X 134E. We have ascertained that the star system that the halls of memory are in is a green class-A star and forms an equilateral triangle with The Hook and The 6 Yellow Stones. We surmise that these were constellations in the Leghk cosmology, but as to where these are perhaps those aboard the Elthar-Esh will be able to answer the question"


The obvious (and wrong) conclusion to draw from this is that the A-class system that forms the third point of the triangle is the Tarn system, at 54, 104 P1, but the Halls of Memory are not there. (After all, that is the only A-class star system you can see on your stramap that fits the conditions.) Fortunately for you, the Elthar-Esh (the Lowar ship) made the same mistake. On the Tarn planet you can find a message that says:

Quote:
"9 days we have spent here trying to figure out where we could have gone wrong. I am certain that those on Elthesh could not have been mistaken. The Halls of Memory should be here. This is the A-class star that forms the triangle. Of course, if there happened to be... No, the coincidence would be too great. Yet, it is possible. And, it would explain this puzzle... -- Captain of the Elthar-Esh"


The hint that the captain gives you relates to another piece of information you can get from the Kher:

Quote:
Since one is behaving in an appropriate manner and not rudely insisting that one exists when one does not, one will tell one an important secret. One happens to know that, on a certain planet at a certain place, one might not find what one were looking for, and one might consider looking at the same place on a different planet that is inside a certain nebula.


Quote:
One might also point out in a similar vein to the last comment one made regarding a certain important secret, that one might keep in mind that a single line may be part of two triangles, of course, one might not care about this in the slightest.


This finally directs you to the location of the Halls of Memory in an A-class star system, hidden in a small nebula near the upspin side of the sector -- since you cannot detect star systems inside nebulas, this system does not appear on your starmap. You have to explore the nebula yourself. Luckily it is small, and the system can be found fairly quickly. (You just have to find out which planet has the Guardian orbiting it.) The Halls of Memory are located at (131, 219) P2 at 26S*135E.

As for the Guardian Transmitter, the Dweenle in the present know a little about this and tell you that in the past, the last few good Leghk created the Guardian and the Transmitter and entrusted (its location) to the Dweenle, but that they have since forgotten the location. The real source of information is the Dweenle in the past, after you have given them Nidberries. The Dweenle have the story of the Uhl, the Uhlek, the Elthar-Esh, and give you the riddle that the Leghk left with them that tells the location of the Guardian Transmitter.

When you get to the Hals of Memory, the Leghk there fill in the gaps for you on the Uhl story. There is no direct clue in the game that tells you that Gorzek is the other half of the Uhl Weapon. You just have to figure this out. Of course, if you are simply methodical and visit him after getting the Uhl Weapon, he essentially tells you the answer when he requests permission to combine with the Uhl Weapon.