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5.4 × 10 83 Qs (1.7 × 10 106 years): The approximate lifespan of a supermassive black hole with a mass of 20 trillion solar masses [21] 10 10 10 76.66 {\displaystyle 10^{10^{10^{76.66}}}} Qs: The scale of an estimated Poincaré recurrence time for the quantum state of a hypothetical box containing an isolated black hole of stellar mass [ 22 ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 24 January 2025. Scientific projections regarding the far future Several terms redirect here. For other uses, see List of numbers and List of years. Artist's concept of the Earth 5–7.5 billion years from now, when the Sun has become a red giant While the future cannot be predicted with certainty ...
One trillionth of a second. nanosecond: 10 −9 s: One billionth of a second. Time for molecules to fluoresce. shake: 10 −8 s: 10 nanoseconds, also a casual term for a short period of time. microsecond: 10 −6 s: One millionth of a second. Symbol is μs millisecond: 10 −3 s: One thousandth of a second. Shortest time unit used on ...
One billion or 10 9 years. Cosmology and geology. [39] For example, the formation of the Earth occurred approximately 4.54 Ga (4.54 billion years) ago and the age of the universe is approximately 13.8 Ga. Ta (for teraannus) One trillion or 10 12 years: An extremely long unit of time, about 70 times as long as the age of the universe.
1 week, 4 days, 13 hours, 46 minutes, 40 seconds 10 −9 s ns nanosecond: 10 9 s Gs gigasecond 31.7 years 10 −12 s ps picosecond: 10 12 s Ts terasecond 31,700 years 10 −15 s fs femtosecond: 10 15 s Ps petasecond 31.7 million years 10 −18 s as attosecond: 10 18 s Es exasecond 31.7 billion years 10 −21 s zs zeptosecond 10 21 s Zs ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 20 January 2025. See also: Orders of magnitude (numbers) and Long and short scales Natural number 1000000000 List of numbers Integers ← 10 0 10 1 10 2 10 3 10 4 10 5 10 6 10 7 10 8 10 9 Cardinal One billion (short scale) One thousand million, or one milliard (long scale) Ordinal One billionth (short ...
An attosecond (abbreviated as as) is a unit of time in the International System of Units (SI) equal to 10 −18 or 1 ⁄ 1 000 000 000 000 000 000 (one quintillionth) of a second. [1] An attosecond is to a second, as a second is to approximately 31.69 billion years. [2]
To put in perspective the size of a googol, the mass of an electron, just under 10 −30 kg, can be compared to the mass of the visible universe, estimated at between 10 50 and 10 60 kg. [5] It is a ratio in the order of about 10 80 to 10 90 , or at most one ten-billionth of a googol (0.00000001% of a googol).