Ni pataki awon igbana adapo alemin (organic compound) n sele pelu O2 tabi pelu awon ohun alara to ni oksijini bi afefe tabi baba oloksijini(II) (CuO).Iru igbana A le pin igbana si eyi topari ati eyi tikopari gege bi iye O2 to wa ati awon iwakani igba na. 
While it had been hypothesized in the early 1960s that black holes would be found at the centers of some Galaxies, and work in the 1980s identified a number of good black hole òpóther, it fell to work conducted with Hubble to show that black holes are probably common to the centers of all Galaxies.. 