A terasecond (symbol: Ts) is 1 trillion (1 × 1012) seconds, or roughly 31,710 years. This page lists time spans above 1 terasecond.
Shorter times
12 Ts (379,000 years) – the time that elapsed after the Big Bang before the cosmic microwave background radiation (CMBR) was emitted
31.6 Ts (1 million years) – about the average lifespan of a blue supergiant star
80 Ts (2.54 million years) – approximate time needed for light to travel from the Andromeda Galaxy to the Milky Way
82 Ts (2.6 million years) – estimated duration of the Paleolithic Period
130 Ts (4 million years) – estimated average lifetime of biological species
137 Ts (4.32 million years) – one mahayuga, or 12,000 divine years, in Hindu mythology
850 Ts (27 million years) – estimated duration of the Silurian Period
1 thousand teraseconds (or 1 quadrillion seconds) is called a petasecond, and is equal to about 32 million years.
1.4 Ps (45 million years) – estimated duration of the Ordovician Period
1.6 Ps (50 million years) – estimated duration of the Triassic and the Permian Periods
1.7 Ps (54 million years) – estimated duration of the Cambrian Period
1.8 Ps (56.8 million years) – estimated duration of the Devonian Period
1.9 Ps (60 million years) – estimated duration of the Carboniferous Period
2.0 Ps (62.4 million years) – estimated duration of the Tertiary Period
2.1 Ps (65 million years) – estimated duration of the Jurassic Period
2.5 Ps (80 million years) – estimated duration of the Cretaceous Period
5.85 Ps (185 million years) – estimated duration of the Mesozoic Era
7.9 Ps (250 million years) – approximate length of one galactic year (one revolution of the Solar System around the galactic center)
9.22 Ps (291 million years) – estimated duration of the Paleozoic Era
25 Ps (800 million years) – duration of the Hadean Eon
31.688 Ps (1 billion years) – 1 eon
41 Ps (1.3 billion years) – estimated duration of the Archaean Eon
63 Ps (2 billion years) – estimated duration of the Proterozoic Eon
125 Ps (4 billion years) – estimated duration of the Precambrian Supereon
137 Ps (4.32 billion years) – one kalpa, or half a day in the lifetime of Brahma, in Hindu mythology
315 Ps (10 billion years) – expected main sequence lifetime of a G2 dwarf star (like our Sun) – also, the estimated lifespan of a globular cluster before its stars are ejected by gravitational interactions
1 million teraseconds (or 1 quintillion seconds) is called an exasecond, and is equal to 32 billion years, or roughly twice the age of the universe at current estimates (the universe is currently thought to be a bit less than 14 billion years old).
1.08 Es (34 billion years) – estimated lifetime of the universe, assuming the Big Rip scenario is correct; experimental evidence currently suggests that it is not
300 to 600 Es (10 to 20 trillion years) – approximate lifetime of the longest-lived stars, the low-mass red dwarfs
1 billion teraseconds (or 1 sextillion seconds) is called a zettasecond and is equal to roughly 32 trillion years.
3 Zs (100 trillion years) – estimated duration of the Stelliferous Era (the time during which the stars shine)
9.85 Zs (311 trillion years) – the lifetime of Brahma in Hindu mythology
Yottaseconds and beyond
1 trillion teraseconds (or 1 septillion seconds) is called a yottasecond (Ys) and is equal to roughly 32 quadrillion (or 3.2×1016) years
600 Ys - The half-life of bismuth (209
Bi
)
1.310019×1012 Ys (4.134105×1028 years) – The time period equivalent to the value of 13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.0.0.0.0 in the Mesoamerican Long Count, a date discovered on a stela at the Coba Maya site, believed by archaeologist Linda Schele to be the absolute value for the length of one cycle of the universe
2.6×1017 Ys (8.2×1033 years) – the smallest possible value for proton half-life consistent with experiment
1029 Ys (3.2×1045 years) – the largest possible value for the proton half-life, assuming that the Big Bang was inflationary and that the same process that made baryons predominate over antibaryons in the early Universe also makes protons decay
6×1053 Ys (2×1066 years) – approximate lifespan of a black hole with the mass of the Sun
5.4×1093 Ys (1.7×10106 years) – approximate lifespan of a supermassive black hole with a mass of 20 trillion solar masses
10
10
10
76.66
Ys (
10
10
10
76.66
years) – Scale of an estimated Poincaré recurrence time for the quantum state of a hypothetical box containing an isolated black hole of stellar mass This time assumes a statistical model subject to Poincaré recurrence. A much simplified way of thinking about this time is that in a model in which history repeats itself arbitrarily many times due to properties of statistical mechanics, this is the time scale when it will first be somewhat similar (for a reasonable choice of "similar") to its current state again.
10
10
10
120
Ys (
10
10
10
120
years) – Scale of an estimated Poincaré recurrence time for the quantum state of a hypothetical box containing a black hole with the mass within the presently visible region of the Universe.
10
10
10
10
13
Ys (
10
10
10
10
13
years) – Scale of an estimated Poincaré recurrence time for the quantum state of a hypothetical box containing a black hole with the estimated mass of the entire Universe, observable or not, assuming Linde's chaotic inflationary model with an inflaton whose mass is 10−6 Planck masses.