Question to Riot lore writers: Were the Targonians Space colonizers?

"These chosen few sought to unravel the secrets of the universe and had already expanded beyond their home planet."

"For millennia, he fought Targon’s wars, crushed any threats to its dominance, and helped it forge a star-spanning empire."

Now, were they truly space travelers who settled other planets?

Or does this refer to the those beings who inhabit the Aspects? The cosmic beings.

If this is revealed with Taric's lore, there's no need for a spoiler. If not, then I'd like to know.