ultramassive造句

• However, the possibility of an ultramassive black hole has not been ruled out entirely, since only a black hole of that mass can account for the observed power output of the quasar.
• So-called "'ultramassive black holes "'( UMBHs ), which are at least ten times the size of supermassive black holes, appear to have a theoretical upper limit of around 50 billion solar masses, as anything above this slows growth down to a crawl ( the slowdown tends to start around 10 billion solar masses ) and causes the unstable accretion disk surrounding the black hole to coalesce into stars that orbit it.