Ann wrote:I appreciate being told these numbers. I have sometimes tried converting light-years to kilometers, and I have always failed. So it's 38 trillion kilometers, then. How do you say the other number - nine point five trillion kilometers? I tried to say it in Swedish, where a "trillion" is of course a "biljon", but in any case it sounded wrong. I found myself reading 9,5000,000,000,000,000 as "ninety-five trillion" and then getting confused at the obvious thirty-eight trillion (38,000,000,000,000,000) which seemed to small to be four times 9,5000,000,000,000,000. Maths and I are not good friends!

The distance is certainly impossible to imagine, in any case. When I made a model of the inner solar system, I found that I couldn't even really imagine the distance between the Earth and the Sun. I tried to picture myself sitting in a fantastically heat- and radiation-proof spaceship traveling to the Sun, and I tried to imagine the actual distance the spaceship would have to travel to reach the Sun. I couldn't find a way to make this distance understandable in terms that I am the least familiar with.

Ann

Ann, what is so hard to understand about 93 million miles? But then I have trouble with A.U. and Parsecs. If I drove my Z to the Moon and back, I would be just barely on my way back, in terms of MILEAGE on my Z. 268,800 miles. Not bad for a 40 year old car.

AND, the word you are looking for is, QUADRILLION....95 quadrillion. At least in American Counting.

9,5000,000,000,000,000....plus the original quote is in error. It has a 5000 where only 3 decimals should be....it should be written:

95,000,000,000,000,000

That would be.....95,.....000......000.....000.....000.......000

quads, trills, bills, mills, thous, hundreds.

Same with the 38....38 Quadrillion. Much easier than 38 thousand million million.

Quadrillion may mean either of the two numbers, 1,000,000,000,000,000 (one thousand million million)...in the American System, this is 1 quadrillion. And other version of this number is what we would call a SEPTILLION. The SEVENTH place. 1,000,000,000,000,000,000,000,000 but it can be called a Quadrillion in other countries....

Here is a good article to explain large numbers.

http://en.wikipedia.org/wiki/Names_of_large_numbers
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