This was a fun report to read, I especially enjoyed the 16 page, arXiv paper cited in the space.com report. blanets in the model, their long term stability is not known and no test(s) cited so blanets can be verified. Here is some geeky stats from the arXiv report (ME is mass of earth). The arXiv paper shows most blanets could be 20 to 3,000 earth masses in size, others even larger.
'Formation of \Blanets" from Dust Grains around the Supermassive Black Holes in Galaxies'
"...4.2. Number and mass of blanets In the final stage of the evolution, the blanetecimal disk can be gravitationally unstable, and it fragments into massive objects, i.e., blanets (see x2.3)...For MBH = 10^7 Msun, Mbl >~10^4ME - 10^5ME outside the snowline. However, this extraordinary massive blanet is unlikely, because it is comparable to the minimum mass of brown dwarfs (~ 2 x 10^4ME). Therefore, the largest size of the blanets would be maximally ~ 10 x Earth's radius at r ~ 3 pc for MBH = 10^6Msun, if the average internal density is similar to that of the Earth...5. SUMMARY In this follow-up paper of Wada et al. (2019) (Paper I), we theoretically investigated a process of dust evolution around a SMBH in the galactic center. We proposed that a new class of planets, blanets (i.e., black hole planets) can be formed, provided that the standard scenario of planet formation is present in the circumnuclear disk...Our results suggest that blanets could be formed around relatively low-luminosity AGNs during their lifetime (<~ 10^8 yr). The gaseous envelope of a blanet should be negligibly small compared with the blanet mass. Therefore, the system of blanets are extraordinarily different from the standard Earth-type planets in the exoplanet systems. The dynamical stability of such a system around a SMBH may be an interesting subject for future studies."
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