Knucklehead Smith wrote:

Jim Kelley wrote:

...

Name a place in the universe where the Cesium atom transitions at a
different frequency in that reference frame than it does in our
reference frame, provide the underlying physics to explain it, and
then prove it.

Name me one instance where anyone has achieved taking a cesium atom to
absolute zero ...

No one has ever stuck a themometer in the sun either but we have a
pretty good idea what it would read if we did.

We have absolutely no reason to expect the Cesium atom to act any
differently in another reference frame, and variety of reasons not to
expect to be able to chill it to 0 degrees Kelvin.

ac6xg