# NavList:

## A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

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Re: Quantum Compass
From: Bill B
Date: 2014 May 16, 14:22 -0400

```On 5/16/2014 11:51 AM, Greg Rudzinski wrote:
> An unexpected solution to GPS deficiencies using a laser refrigerator.

Off topic, but a little math help from our physics friends please.

The article states, "Ultra cold atoms are cooled with lasers to
temperatures a billion times colder than outer space."

The following site states:

"The surface temperature of Pluto can get as low as -240 Celsius, just
33 degrees above absolute zero.

Clouds of gas and dust between the stars within our galaxy are only 10
to 20 degrees above absolute zero.

And if you travel out far away from everything in the Universe, you can
never get lower than a minimum of just 2.7 Kelvin or -270.45 Celsius.

This is the temperature of the cosmic microwave background radiation,
which permeates the entire Universe."

http://www.universetoday.com/77070/how-cold-is-space/

-273.15 C or or 0 K is absolute zero. A kelvin unit is 1/273.16 the
triple point of water (0.01 C)

For the sake of discussion, let's say outer space is 10 K, or 10/273.16
kelvin units. Does on billionth colder than outer space imply 3.66 x
10^-12 K?

```
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