One Photo - 10,000 Galaxies

Take a look...as far back in time as human eyes have ever seen. Some of these galaxies are over 13 Billion light years away, dating to a time when the Universe was a mere 700 million years old. This tiny patch of (seemingly empty) space when viewed by Hubble for a million seconds reveals 10,000 galaxies. How many galaxies do you imagine there are in total in the physical universe?