Fox News: Bizarre, Earth-sized rogue planet found floating in Milky Way.
https://www.foxnews.com/science/bizarre-earth-sized-rogue-planet-floating-milky-way?cmpid=prn_newsstand 

In August, a separate group of researchers suggested there could be more "rogue" planets than there are stars in the Milky Way galaxy.

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Would it be reasonable to say that an EMS of TL 13+ would have a fairly easy time spotting rogue planets in a rift?
What's the thoughts on them being useful for refueling?