[lwoodham]

Given, that a stack of $1000.00 bills equal to a million dollars is 8.5 inches high, then:

1 billion $ would be 8.5 x 1000 = 8,500 inches high
1 trillion $ would be 8500 x 1000 = 8,500,000 inches high

or
1 trillion $ would be 8,500,00/12 = 708,333 feet high
1 trillion $ would be 708,333/5289 = 134.15 miles high

1 trillion in $100 bills would be = 1341.5 miles high
1 trillion in $1 bills would be = 134,150 miles high

[FormerLurker]

As the average distance of the Earth to the moon is 239,000 miles, $1 trillion dollars in $1 bills would be 0.56 of the distance (or a little over halfway) to the moon.