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An active galactic nucleus (AGN) is a compact region at the center of a galaxy that has a much ... Early photographic observations of nearby galaxies detected some ... and the impact of black hole accretion and quasar activity on galaxy evolution. .... can scatter some of the nuclear emission into our line of sight, allowing us to ...


A quasar (/ˈkweɪzɑːr/) (also quasi-stellar object or QSO) is an active galactic nucleus of very ... Quasars emit energy across the electromagnetic spectrum and can be ... As of 2011, the most distant known quasar is at redshift z=7.085; light .... holes in the nuclei of distant galaxies, making these luminous versions of the ...


Why would this tend to change the spiral galaxy into an elliptical galaxy? ... How do observations of distant galaxies help us learn about galaxy evolution?


Our goals for learning. • How do we observe the life histories of galaxies? ... observations show us very distant galaxies as they were much earlier in time.


How do galaxies evolve? ... Deep observations not only look to great distances, but also look back in time. This means we see distant galaxies as they were when they were .... helping us understanding the galaxy evolution. ... Learning goals.


Our goals for learning: – How do we observe the life histories of galaxies? – How do ... observations show us very distant galaxies as they were much earlier in.


Explain how astronomers use light to learn about distant galaxies long ago; Discuss the ... We do, however, have one remarkable asset in studying galactic evolution. .... of galaxies of each type during each epoch of the universe, it will help us ...


Clumpy and distant galaxies (needs to be plural) spied by the Hubble. ... a big open question in astronomy, and JWST will help astronomers to learn more. ... Follow-up observations using spectroscopy of hundreds or thousands of galaxies will .... us to better understand galaxy collisions, galaxy formation, and the evolution ...


Jul 29, 2008 ... A frequent sign of the maturity of a spiral galaxy is the formation of a ribbon of ... The observations are part of the Cosmic Evolution Survey (COSMOS). ... only 20 percent of the spiral galaxies in the distant past possessed bars, ... "We know that evolution is generally faster for more massive galaxies: They ...