Astronomers could make this complex mosaic on the side of a large building, but it is unlikely that they would be able to include all 100 billion galaxies (i.e. 60 billion spiral/barred spiral galaxies, 20 billion lenticular galaxies, 15 billion elliptical galaxies, and 5 billion irregular/peculiar galaxies).
Thats's not an easy question to answer ... Lets assume, it takes the space telescope one second to take a picture of a single galaxy in a usable resolution (we are not talking about 1 galaxy per pixel, here, are we?) 100000000000 galaxies / 3600 sec / 24 hrs / 365 days is roughly 3171 years. Even with a thousand galaxies on each photo, it would be over 3 years ... So, well, yes, the Hubble telescope could take a mosaic photo ... but either it will take forever or you will only see a small number of them ...
A picture made with with tiles and stone is a mosaic.
There is a mosaic picture from AD 261 in this weeks newspaper.
"Mosaic" is a reference to Mosaic law - the laws handed down by Moses, ie: Judaism.
gaudi'sryptthe Alexander mosaic
NCSA Mosaic, or simply Mosaic
Mosaic moray was created in 1926.
The Mosaic Company was created in 2004.
Mosaic in Green was created in 2004.
Mosaic Fashions was created in 2003.
Canadian Mosaic was created in 1938.
Mosaic Records was created in 1983.