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Even well-established names like sextillion are rarely used, since in the context of science, including astronomy, where such large numbers often occur, they are nearly always written using scientific notation. In this notation, powers of ten are expressed as 10 with a numeric superscript, e.g.
It can be expressed as , , , and 3 3 or when using Knuth's up-arrow notation it can be expressed as and . Astronomy: A light-year , as defined by the International Astronomical Union (IAU), is the distance that light travels in a vacuum in one year, which is equivalent to about 9.46 trillion kilometers ( 9.46 × 10 12 km ).
List of orders of magnitude for energy; Factor (joules) SI prefix Value Item 10 −34: 6.626 × 10 −34 J: Energy of a photon with a frequency of 1 hertz. [1]8 × 10 −34 J: Average kinetic energy of translational motion of a molecule at the lowest temperature reached (38 picokelvin [2] as of 2021)
30.8568 Ym – 3.2616 billion light-years – 1 gigaparsec; 31.2204106 Ym − 3.3 billion light-years − length of The Giant Arc, a large cosmic structure discovered in 2021; 33 Ym – 3.5 billion light-years – maximum distance of the 2dF Galaxy Redshift Survey (light travel distance) 37.8 Ym – 4 billion light-years – length of the Huge-LQG
A Stellantis joint venture with Samsung SDI has won a commitment from the U.S. government for up to a $7.54 billion loan to help build two electric vehicle battery plants in Kokomo, Indiana.
astro: luminosity of the entire Observable universe [90] ≈ 24.6 billion trillion solar luminosity. 10 49: 3.6 × 10 49 W astro: peak gravitational wave radiative power of GW150914, the merger event of two distant stellar-mass black holes. It is attributed to the first observation of gravitational waves. [91] 10 52: 3.63 × 10 52 W
Sextillion may mean either of the two numbers (see long and short scales for more detail): . 1,000,000,000,000,000,000,000 (one thousand million million million; 10 21; SI prefix zetta-) for all short scale countries
An overview of ranges of mass. To help compare different orders of magnitude, the following lists describe various mass levels between 10 −67 kg and 10 52 kg. The least massive thing listed here is a graviton, and the most massive thing is the observable universe.