Is there any unit of time that is not based on the Earth's orbit around the sun, or its spinning on its axis?

Question

Seconds, minutes, hours, years are all based on how long it takes the Earth to make one revolution on its axis or the time it takes to make one orbit of the sun. How would we communicate time to an extraterrestrial without reference to our own planet?

Answer 1

How about Planck Time? It's the most basic time unit in physics and certainly not based on earth's orbit or rotation.

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

Answer 2

Conservation of angular momentum. The Earth (and the different planets interior the photograph voltaic gadget) formed from a rotating cloud of gasoline and dirt. the certainly value of rotation has been plagued by historic encounters on the grounds that that element. Rotation velocity might have greater desirable as mass grow to be pulled in from an accretion disk. that's pronounced that the Earth won the Moon whilst yet another planetary physique crashed into the nascent Earth early interior the history of the photograph voltaic gadget and this sort of collision might have affected the rotation of the Earth. by fact the advent of the Earth-Moon gadget the rotation value of the two bodies has been plagued by tidal interactions between the two. often this has brought about a sluggish relief interior the rotation value of the Earth. Earthquakes and different geological pastime reason redistributions of mass interior the Earth which even have small effects in the international's rotation.

Answer 3

Seconds are not really based on the day, although they were originally defined as 1/60 of a minute which was defined as 1/60 of an hour which was defined as 1/24 of a day. Modern seconds are based on the frequency of a cesium atom's vibration under controlled conditions. It is much more stable that the motion of the Earth.

Answer 4

Time is certainly based on observable interactions of the sun with the earth.

But this direct measure is no longer required, time is now measured using atomic clocks or quartz crystals. Each of these uses vibrations of the atom or crystal to track the passage of time.

For example 1 second is defined as the time taken for a caesium atom to vibrate 9,192,631,770 times at a known temperature and pressure.

So it is not necessary to have any involvement of earth, our measurement and perception of time can be quite easily described.

Hope this helps

Answer 5

If there wasn't how could we record if it is not based on anything we know. We wouldd't even be able to recognize it if it had no connection to what we know as time. Anyway, maybe space is a time unit that can never really be measured or defined. A black hole too maybe since we don't know where the things caught in it go to .

Answer 6

Yes. The international standard for the length of a second is based upon a certain number (a very high number) of vibrations of a cesium atom. I don't know that number, but you can look it up. Presumably, the vibration rate of cesium atoms is the same everywhere.

Answer 7

The first space-time pulse that came into existence when the universe started would be a quantum entity that would not change.

Answer 8

What about light years?

What does unit of time have to do with communication with extraterrestrials?

Answer 9

well a millenium is like a centennial, but it has more legs