by measuring quasars scientist have found that 13.8 billion years ago
the rate of speed of the expansion of the universe or the expansion of space
was 68 kilometers (42 miles) per second per million light-years.
this means that 13 billion years ago if two light waves were emitted 1 cm apart
and were pointed in the direction of where the earth is located today
( such as one of the recently viewed distant galaxies )
then those two light waves or photons would have been expanding away from each other
for 13 billion years if the expanding space theory and its description of how
space carries the galaxies apart from each other is true.
the light from the distant galaxies that we see today has been traveling and expanding
for 13 billion years because the galaxy is 13 billion light years away from the earth.
1 million ly = 5878625373183608000 miles
42 miles = 2,661,120 inches
5878625373183608000 miles/1,000,000 = 5,878,625,373,183.608 miles per 1 ly
2,661,120 inches/1,000,000 = 2.66112 inches per 1 ly
5,878,625,373,183.608 miles/365 days = 16,105,822,940.229063013698630136986 miles per day
2.66112 inches/365 = 0.00729073972602739726027397260274 inches per day
16,105,822,940.229063013698630136986 miles/24 hours = 671,075,955.84287762557077625570776 miles per hour
0.00729073972602739726027397260274 inches/24 = 3.0378082191780821917808219178082e-4 inches per hour
671,075,955.84287762557077625570776 miles/60 minutes = 11,184,599.264047960426179604261796 miles per minute
3.0378082191780821917808219178082e-4 inches/60 = 5.0630136986301369863013698630137e-6 inches per minute
11,184,599.264047960426179604261796 miles/60 seconds = 186,409.98773413267376966007102993 miles per second
5.0630136986301369863013698630137e-6 inches/60 = 8.4383561643835616438356164383562e-8 inches per second
8.4383561643835616438356164383562e-8 inches per second
the above is the speed of the expansion per second for each second in the next 13 billion years.
now we multiply to find the distance between the light waves that would reach the earth in 13 billion years.
there are 31,536,000 seconds in a year and the light has traveled for 13 billion years.
8.4383561643835616438356164383562e-8 inches per second x 31,536,000 seconds per year = 2.66112 inches per year
2.66112 inches per year x 13,000,000,000 years = 34,594,560,000 inches per 13 billion years
34,594,560,000 / 12 inches = 2,882,880,000 feet per 13 billion years
2,882,880,000 feet / 5280 ft per mile = 546,000 miles per 13 billion years.
each light wave would be 546,000 miles apart from its closest neighbor.
I highly doubt that a single light wave would enter any telescope.
but that would only happen if the expanding space theory were true , and it is
because the expanding space theory is not true that the observeable universe is observable.