Actually that is "earth dust" to people.....
Since planetary formation theories are now questionable, yes, you can say it is implausible from stardust...
Three Theories of Planet Formation Busted, Expert Says
RSR's List of Problems with Solar System Formation | KGOV.com
Our Very Normal Solar System Isn't Normal Anymore
""Before we ever discovered any [planets outside the solar system] we thought we understood the formation of planetary systems pretty deeply." We had our frost line. We knew how solar systems formed. "It was a really beautiful theory," he says. "And, clearly, thoroughly wrong.""
except we can see star systems out there forming, so they do form as we think formation wise, exactly how may be off.
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