What is the Hubble Ultra Deep Field?
Q: What is the Hubble Ultra Deep Field?
A: The Hubble Ultra Deep Field, or HUDF, is an image of a small part of space in the direction of the constellation Fornax. It is the furthest image of the universe ever taken by humans.
Q: How long did it take to capture this image?
A: It took more than 3 months to capture this image, from September 24, 2003 to January 16, 2004.
Q: How old was the universe when this image was taken?
A: When this image was taken, the universe was about 800 million years old.
Q: How many galaxies are visible in the Hubble Ultra Deep Field?
A: The HUDF contains an about 10,000 galaxies.
Q: Where is the patch of sky where these galaxies are located?
A: The patch of sky where these galaxies are located is southwest of Orion in the Southern-Hemisphere constellation Fornax at right ascension 3h 32m 40.0s and declination -27° 47' 29" (J2000).
Q: How large is this patch of sky compared to a 1 by 1 millimetre square piece of paper held one metre away?
A: This patch covers 36.7 square arcminutes which is smaller than a 1 by 1 millimetre (0.039 by 0.039 in) square piece of paper held 1 metre (3 ft 3 in) away and equal to roughly one thirteen-millionth of total area of the sky.
Q: How much exposure time did it require for both ACS and NICMOS cameras combined?
A:The total amount exposure time required for both ACS and NICMOS cameras combined was 11.3 days for ACS and 4.5 days for NICMOS
