I tried to start a Hubble Fan Club a few years ago. Nobody in Louisiana was interested.

Farhad. The same thing happened to me when I tried explaining it to my wife. People just don't seem to be able to grasp it, or why it would be important to anyone. But even when you say that the earth is like a grain of sand and the universe is like the world, we are still VASTLY understating the size of the known universe.

This site is a really good source for hubble images: http://antwrp.gsfc.nasa.gov/apod/

You can download a high resolution version of NASA's Ultra Deep Field Hubble picture here:
http://hubblesite.org/newscenter/archive/releases/2007/06/image/e/

*promote

Yes, the following can contribute to orbital decay.
Perturbations due to Non-spherical Earth (including tidal drag)
Third-Body Perturbations (moon, planets, etc.)
Perturbations from Atmospheric Drag
Perturbations from Solar Radiation (Intense solar activity causes our atmosphere to expand outward in addition to the effects of solar wind itself)

"The space shuttle and the ISS both orbit within the thermosphere. The thermosphere is about a million times less dense than the atmosphere at sea level, but that's enough to affect the orbits of these satellites."

http://orbitaldebris.jsc.nasa.gov/faqs.html
12). How long will orbital debris remain in Earth orbit?
The higher the altitude, the longer the orbital debris will typically remain in Earth orbit. Debris left in orbits below 600 km normally fall back to Earth within several years. At altitudes of 800 km, the time for orbital decay is often measured in decades. Above 1,000 km, orbital debris will normally continue circling the Earth for a century or more.

IIS altitude: roughly 350 km
Hubble altitude: roughly 600 km
"The ISS will sink a couple of kilometers per year in the future because of atmospheric drag - in its current configuration"

Over a thousand more pieces of junk just added:
http://news.bbc.co.uk/2/hi/science/nature/6398513.stm

A fascinating one-off documentary from Channel 4 (UK) - detailing Einstein's struggle with his cosmological constant:

" When Albert Einstein formulated General Relativity in 1915, he was not aware the Universe was expanding. Large scale structure in the form of galaxies was not known and all fuzzy luminous nebulae were considered basically similar and within stellar distance scales. Only with Hubble work in 1930 came the realization some of those nebulae were in fact island universes, and that they were not only very far, but also receding from us at enormous speeds. This was not known for Einstein, and since gravitation exerts its influence up to infinity, it was natural for him to postulate some force working in the preservation of an apparent equilibrium among matter, preventing universal collapse. This is why he postulated the Cosmological Constant, symbolized by the Greek letter Lambda, and included a term accounting for it in the field equations. Once universal expansion was discovered, the need for an unknown repulsive agent could be dropped and Einstein dismissed the Cosmological Constant as his 'biggest blunder'"

Not really therealblankman, the light emissions captured by the Hubble would have been traveling for thousands of years. Most of the stars or even galaxies shown might have ceased to exist a millenia ago.

"The image, called the Hubble Deep Field (HDF), was assembled from 342 separate exposures taken with the Wide Field and Planetary Camera 2 (WFPC2) for ten consecutive days between December 18 and 28, 1995.
Representing a narrow "keyhole" view stretching to the visible horizon of the universe, the HDF image covers a speck of the sky only about the width of a dime located 75 feet away. Though the field is a very small sample of the heavens, it is considered representative of the typical distribution of galaxies in space because the universe, statistically, looks largely the same in all directions. Gazing into this small field, Hubble uncovered a bewildering assortment of at least 1,500 galaxies at various stages of evolution.
Nearly a year of preparation preceded the observation. The HDF team selected a piece of sky near the handle of the Big Dipper (part of the northern circumpolar constellation Ursa Major, the Great Bear). The field is far from the plane of our Galaxy and so is "uncluttered" of nearby objects, such as foreground stars. The field provides a "peephole" out of the galaxy that allows for a clear view all the way to the horizon of the universe.
Test exposures made in early 1995 with Hubble and the 4-meter telescope at Kitt Peak National Observatory also confirmed the field is devoid of large galaxy clusters, which would interfere with seeing farther and fainter objects. The target field is, by necessity, in the continuous viewing zone (CVZ) of Hubble's orbit, a special region where Hubble can view the sky without being blocked by Earth or interference from the Sun or Moon.
The most common type of galaxy in the universe are (or 'were') small irregular objects called blue dwarfs. However, they were edited out.
Produced by astronomers at the State University of New York at Stony Brook."