[Wuli]

I wonder if the mass relative to “loose” planets - whose travels do not seem to be (yet) among the calculated mass of the star systems, or the calculted gravitational forces affecting star systems’ travels in their own galaxies - could actually be part of the hypothetical “dark matter” needed to explain current accepted theories of the universe.

[SunkenCiv]

The ratio of 100,000:1 (rogues to orbiting) would be a tiny fraction of what is needed, but you may have struck on the reason for this hypothesis. :’)

[AnotherUnixGeek]

I wonder if the mass relative to “loose” planets - whose travels do not seem to be (yet) among the calculated mass of the star systems, or the calculted gravitational forces affecting star systems’ travels in their own galaxies - could actually be part of the hypothetical “dark matter” needed to explain current accepted theories of the universe.

This was the first thing I thought of too, when I saw these news stories. But thinking about it, by definition these solo planets either formed from clouds of matter that weren't big enough to form stars or they're fairly small breakaway planets. I'd guess they aren't significant in the total mass of matter in the galaxy.