... Regarding what are now called deep-sky objects, Kirch found the open cluster M 11 in Ganymede (now Scutum). ... In 1986 he founded a Czech deep-sky association 'The Amateur Sky Survey', which has about 50 active members today.. ...
... Within the Hubble Ultra Deep Field there are approximately 10,000 discrete objects. ... The total field of view represents only 1 ten millionth of the total sky. ...
... Selected Area 57 (SA 57) is an area of the sky approximately one square degree which was the target of a deep survey initially done with the KPNO 4-m telescope. ...
... Evidently this method only works if the data are good and deep enough, as the errors in the magnitudes are still mainly determined by the errors in the sky subtraction. ...
... The Large Magellanic Cloud is very large, about 6x6 square degrees in the sky. ... galaxies are objects with very low contrast with respect to the night sky background ...
... 3.5.4 The Deeply Probed Universe . 3.5.5 Correlation Scales . ... 6.2.2 Deep Galaxy Counts: The Mystery of the Faint Blue Galaxies . ... 7.3 Future Observations . The Sloan Digital Sky Survey . ...