# The Power of 10 – A Trip Around the Universe – Part 2 of 2

In part one, we took a trip around the universe and saw ours and other planets, the orbits, our sun, stars and galaxies; using the power of 10 as a positive number. In this final part of the power of 10, we look at the negative power of 10.

From Wikipedia, the negative power of 10 is:

The negative 10 power related to a short scale name can be determined based on its Latin name-prefix using the following formula: 10 -[(prefix-number + 1) × 3]

Examples: billionth = 10 -[(2 + 1) × 3] = 10 -9; quintillionth = 10 -[(5 + 1) × 3] = 10 -18

We’ll start with 100 (equivalent to 1 meter), and will decrease the size by a factor of 10, or 10 -1 (meters), and so on, until we reach our known limit.

We shall start in the same place as in Part 1, looking down on the ground:

Note that going downwards we could only go to the power of minus 16ª of 10 to reach the (known?) limits of matter…

But upwards we went to the power of 23ª of 10 and stopped… But we could have continued our trip subject only to the limits to our imagination.