The Hubble Ultra Deep Field (HUDF) million-second-long exposure reveals the first galaxies to emerge from the so-called "dark ages", the time shortly after the big bang when the first stars reheated the cold, dark universe.
How wide is the Ultra Deep Field's slice of the heavens?
The Hubble Ultra Deep Field is called a "pencil beam" survey because the observations encompass a narrow, yet "deep" piece of sky. Astronomers compare the Ultra Deep Field view to looking through an eight-foot-long soda straw.
How sharp is Hubble's resolution in pinpointing far-flung galaxies in the Ultra Deep Field?
Hubble's keen vision (0.085 arc seconds.) is equivalent to standing at the U.S. Capitol and seeing the date on a quarter a mile away at the Washington monument.
How many galaxies are in the image?
The image yields a rich harvest of about 10,000 galaxies.
There are estimated to be 170 BILLION GALAXIES in our universe with an estimated average of 200 BILLION STARS per galaxy. Mulitply those together and you have a rough estimate of more than 34,000 BILLION BILLION stars in the universe! That is more than 10 times as many stars as grains of sand on all the world's beaches and deserts!
FAIR USE NOTICE: This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available in our efforts to advance understanding of environmental, political, human rights, economic, democracy, scientific, spiritual, and social justice issues, etc. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, the material on this site is distributed without profit to those who have expressed a prior interest in receiving the included information for research and educational purposes. For more information go to: http://www.law.cornell.edu/uscode/17/107.html If you wish to use copyrighted material from this site for purposes of your own that go beyond 'fair use', you must obtain permission from the copyright owner.