The results show universe is accelerating. Universe's rate of expansion Two research groups disagree by a factor of two, this yields estimates for age of universe as between 10 to 20 billion years. Value converges toward 10 percent accuracy, suggesting an age of 12-14 billion years. Little known about circumstellar environment. Jet-like features noted, stellar disks seen in infrared wavelengths.
Protoplanetary disks are common.
Circumstellar disks confine and direct the flow of jets. Ground-based data are suggestive, but telescopes cannot see close enough to suspected black holes to provide absolute proof. HST precisely measures gas velocity around black hole, providing definitive proof. HST surveys reveal that black holes are common to the cores of galaxies. Quasars Quasars originated early in the universe.