Question: I was rewatching Stargate-SG1 and noticed something while I was watching "[Menace](http://stargate.wikia.com/wiki/Menace)" where we learn that the android Reese created the Replicators and sent them out in to the galaxy.

We know that the Replicators integrate technology they consume to their own and lastly we know of no race that were capable of travelling between galaxies (and that lives in the Milky Way) aside from the ancients

My question is, how did they end up in the [Asgard galaxy](http://stargate.wikia.com/wiki/Ida) (Ida) and why didn't they consume everything in the Milky Way long before the series began?

Is is ever explained?

![enter image description here](https://i.stack.imgur.com/jJP0K.jpg)

Answer: 
reese's planet was an ancient outpost for a small civilisation living in Ida, thus explaining the lack of other ancient tech. The people tried to evacuate home to The Ida Galaxy, but the replicators followed them and killed them anyway consuming all the ancient tech they could, the ancients tried to destroy what they can and so all the replicators went through in order to get as much as they could. This gives them a head start on the Asgard making it harder for them to contain/beat them. The ancients destroy the stargaze to late, allowing all the bugs through but essentially trapping them in Ida. Fan explanation, but not contradicted anywhere to my knowledge.
One of the anicent warships in orbit of the replicator planet in Pegasus gets a hitchhiker just a few Nanites nothing that would show up on the scanners the ship leaves orbit and sets course for the Milky Way and arrives at Reeses planet where the cells having been exposed to the vacuume of space thaw as the ship enters the atmosphere and migrate to the planet. 

Ff a few thousand years[Sic] the Goa'uld finding an anicent city hoping to find some tech they can manipulate/steal and transplant humans to the planet. Ff again the humans having overthrow their Goa'uld masters (like the Galarns backward engineering the memory devices) find an amount of Nanites in a Goa'uld research lab after the damage caused by the ancients trying to destroy them, leaving the replicator planet and entering resses planet as well as exposure to deep space are unable to replicate. Using the Goauld research Resses father creates Reese based on the Nanites terminator style (building a working android from research into tiny machines not the time travel bit that's just silly....) and the rest we know. 

This bits a reach. Some of the replicators make it through the gate to a protected planet aren't beamed away by thorns hammer resses instruction is protect me so the desire for the most powerful tech is paramount and interface with the technology where they find the location of IDA seeing the delicious Asgard tech leave on mass and create the beachhead, having some of their number beamed away by the asgard for experimentation in an attempt to forfull resses order take on the replicate at all costs concept explaining why the didnt just stay in the milkyway and overwhelm it, and the asgard wrongly assume they are native to Ida due to their numbers everything after that we know.