Facts about the Hubble Ultra Deep Field (HUDF) image-
Q: How many galaxies are in the image?
A: The image yields about 10,000 galaxies but this is just a tiny slice of how many exist as there are over 100 billion in the entire universe.
Q: How many stars are within each galaxy?
A: Hundreds of billions of stars that are hundreds of billions of miles apart from one another!
Q: How wide is the Ultra Deep Field's slice of the heavens?
A: 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. The Ultra Deep Field's patch of sky is so tiny it would fit inside the largest impact basin that makes up the face on the Moon. Astronomers would need about 50 Ultra Deep Fields to cover the entire Moon.
Q: If astronomers made the Hubble Ultra Deep Field observation over the entire sky, how long would it take?
A: The whole sky contains 12.7 million times more area than the Ultra Deep Field.
Q: How faint are the farthest objects?
A: The Hubble observations detected objects as faint as 30th magnitude. The faintest objects the human eye can see are at sixth magnitude. Ground-based telescopes also can detect 30th-magnitude objects. Those objects, however, are so dim they are lost in the glare of brighter, nearby galaxies.
Searching for the faintest objects in the Ultra Deep Field is like trying to find a firefly on the Moon. Light from the farthest objects reached the Hubble telescope in trickles rather than gushers. The orbiting observatory collected one photon of light per minute from the dimmest objects. Normally, the telescope collects millions of photons per minute from nearby galaxies.
Q: What is the age of the most distant galaxies in the picture?
A: The most distant galaxies in the HUDF are seen as they were 13 billion years ago, when the universe was only 5 percent of its present age. These observations approach the time in the early universe when stars first began to shine.
Q: How many exposures were needed to make the observations?
A: The Hubble telescope's Advanced Camera for Surveys' wide-field camera snapped 800 exposures, which equals two exposures per orbit. The exposures were taken over four months, from Sept. 24, 2003 to Jan. 16, 2004. The 800 exposures amounted to about 1 million seconds or 11.3 days of viewing time. The average exposure time was 21 minutes.
Q: How sharp is Hubble's resolution in pinpointing far-flung galaxies in the Ultra Deep Field?
A: 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.
AnotherWay83
wow amazing info...makes you feel really insignificant heh
jupiterone
i bet someones posting on a ta clone in one of those galaxies right now
Omega_Blue
that is fantastic stuff.
Imagin
Everytime I see new pictures of deep space it makes me realize just how little we really know.
KilldaDJ
im in awe.
just goes to show how much there is out there to see and how little we know :)
The17sss
That youtube video is crazy. What's so mindblowing to me is trying to comprehend that, for example, we could be looking at a star that has already exploded and disappeared 100 million years ago, no longer existing in the actual present time..... but the light had to travel so far to reach our eye that what we are really seeing is the form of how it appeared 100 million years ago. :crazy:
stren
I bet the light from the time it was first posted, didn't reach your galaxy yet
wing
quote:
Originally posted by Imagin
Everytime I see new pictures of deep space it makes me realize just how little we really know.
when i look at pics of space i wanna trip balls or try astral projectinggg
haven't seen the video before, its crazzzy
IpLaYWiTLiGhTs
There's times when I'm sitting in my car and I start to think how small I am compared to everyone and everything around me, and how crazy it is that everyone is just seamlessly doing their own thing in all different parts of the world.
I can't even fathom that, then to see things like this - ing mind blowing.
What the am I doing in this chair, on this planet, floating in this galaxy, drifting through the universe...
And the green grass grew all around, all around, and the green grass grew all around.
