Terasecond and longer

A terasecond (symbol: Ts) is 1 trillion seconds, or roughly 31,700 years. This page lists time-spans above 1 terasecond. 1 thousand teraseconds, 1 quadrillion seconds (32 million years) is called a petasecond. 1 million teraseconds, 1 quintillion seconds (an exasecond) is roughly twice the age of the universe at current estimates.

• Shorter times

• 379,000 years—time after the Big Bang until cosmic microwave background radiation was emitted
• 1 million years—one epoch (3.16 × 10¹³ seconds); average lifespan of a blue supergiant star
• 2.6 million years—duration of the Paleolithic
• 4 million years—estimated average lifetime of biological species
• 4.32 million years—one mahayuga, or 12,000 divine years, in Hindu mythology
• 27 million years—duration of the Silurian
• 45 million years duration of the Ordovician
• 50 million years—duration of the Triassic and the Permian
• 54 million years—duration of the Cambrian
• 56.8 million years—duration of the Devonian
• 60 million years—duration of the Carboniferous
• 62.4 million years—duration of the Tertiary
• 65 million years—duration of the Jurassic
• 80 million years—duration of the Cretaceous
• 185 million years—duration of the Mesozoic
• 250 million years—one galactic year - one revolution of our Solar System around the center of the Milky Way
• 291 million years—duration of the Paleozoic
• 800 million years—duration of the Hadean
• 1 billion years—1 eon (3.16 × 10¹⁶ seconds)
• 1.3 billion years—duration of the Archaean
• 2 billion years—duration of the Proterozoic
• 4 billion years—duration of the Precambrian
• 4.32 billion years—one kalpa, or half a day in the lifetime of Brahma, in Hindu mythology^[1]
• 10 billion years—expected main sequence lifetime of a G2 dwarf star (like the Sun). Also, estimated lifespan of a globular cluster before its stars are ejected by gravitational interactions.^[2]
• 34 billion years—lifetime of the universe, assuming the Big Rip scenario is correct.^[3] Experimental evidence currently suggests that it is not.^[4]
• 10¹³ (10 trillion) to 2×10¹³ (20 trillion) years — lifetime of the longest-lived stars, low-mass red dwarfs.^[5]
• 10¹⁴ (100 trillion) years: estimated duration of the Stelliferous Era; the time during which the stars shine.
• 3.11 × 10¹⁴ (311 trillion) years—the lifetime of Brahma in Hindu mythology^[6]
• 4.134105 x 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 to be the absolute value for the length of one cycle of the universe.^[6][7]
• 8.2 x 10³³ years—The smallest possible value for proton half-life consistent with experiment.^[8]
• 10⁴¹ 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 anti-baryons in the early Universe makes protons decay.^{, §IVA.€[9]}
• 2×10⁶⁶ years—lifespan of a black hole with the mass of the Sun^[10]
• 1.7×10¹⁰⁶ years— Lifespan of a supermassive black hole with a mass of 20 trillion solar masses^[10]

See also

• Orders of magnitude (time)
• Timeline of the Big Bang

References