"Mike Williams" wrote in message
...
Wasn't it Lysdexic who wrote:
As one with an interest in astounding facts I hope someone can answer this
question. Hubble's field of view for one particular observation was
equated
with the area of a dime at 75 feet, how many of those areas would there be
in the total sky, northern and southern hemispheres? Incidentally, Hubble
identified at least 1,500 galaxies in that observation.

The area of a sphere is 4*pi*r^2, so a sphere radius 75 feet has an area
of 70685.8 square feet.


Yes

The area of a circle is 2*pi*r^2, so the area of a US dime is 0.0108434
square feet.


A dime is 1.79 cm diameter, or 1.79/30.48 feet in diameter = 0.058727 ft

A circle's area is pi r^2, not 2 pi r^2, so the area is 0.0027087 sq ft.

Using the correct size of a dime gives me 26,096,000 (approx) times the area
of a dime.

I double checked by doing it in metric units, same result.

So the total sky sphere is equivalent to 6.5 million dimes.


Your answer is a factor 4 out due to something in the dime area calculation.

--
Mike Dworetsky

(Remove pants sp*mbl*ck to reply)