Philosophy

As usual, more definitions, alternative uses, units, and examples will be added over time.

Eternity a complete linear continuum of instances; in other words it is time without beginning or end; infinite time.

An Exasecond is 32 billion years. One exasecond exceeds the age of the universe by 18.3 billion years.

Eon, or Aeon, is the largest unit of geologic time. Normally it has no exact numerical value, but it sometimes refers to a period of 1,000,000,000 years. The first eon on Earth was the Hadean. It lasted from 4.55 billion years ago (when planet Earth formed) to 3.8 billion years ago. No known organisms lived during the Hadean eon. The Hadean was followed by the Archaean eon, which lasted from 3.8 billion years ago to 2.5 billion years ago, and was superseded by the proterozoic which stretched from 2.5 to .570 billion years ago. Starting .570 billion years ago was the Phanerozoic eon which continues to today.

Eras comprise eons. The Phanerozoic eon is divided into the Paleozoic (570 mya - 245 mya), the Mesozoic (245 mya - 66 mya), and the current era in which we live is the Cenozoic, which began 66 million years ago.

A period is a time span of millions of years that are assumed to have had similar characteristics.

Epoch

Millenium

Century

Decade

Year

Season

Quarter

Month

A Fortnight is two weeks/14 days/336 hours.

A Week is 7 days/168 hours.

A Day is 24 hours.

Hour

Minute

In terms of atomic time, a Second is the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom at zero kelvins. It is most commonly thought of as 1/60 of a minute, 1/3600 of an hour, and 1/86400 of a day.

AYoctosecond, the smallest measurable unit of time, is one septillionth of a second/10^-24 seconds/0.000000000000000000000001 seconds. The symbol for yoctosecond is ys.

Planck's time is the duration required for light to travel Planck length (approximately 1.616 x 10^-35 meters). Planck's time is about 5.39 x 10^-44 seconds All measurements below Planck's time are nonsensical and quantum laws are in control.

posted by A Sinner  # 3:30 PM