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To help compare orders of magnitude of different times this page lists times between 116 days and 1157 days or 3.2 years (107 seconds and 108 seconds).
  • Shorter times
  • 10 megaseconds = 115.74 days
  • 128.6 days — half life of thulium-170
  • 138 days — half life of polonium- 210
  • 224.701 days — one orbit of Venus
  • 271.79 days — half life of cobalt-57
  • 280 days — average length of a human pregnancy; ~24 million seconds
  • 330 days — half life of vanadium-49
  • 333.5 days — half life of californium-248
  • 353, 354 or 355 days — the lengths of regular years in some lunisolar calendars
  • 354.37 days — 12 lunar months; the average length of a year in lunar calendars
  • — The value of pi times 107 seconds is sometimes given as an approximate year value; it works out to 363.61026 days.
  • 365 days — a regular year in many solar calendars; ~31.53 million seconds
  • 365.24219 days — a mean tropical year near the year 2000
  • 365.2424 days — a vernal equinox year.
  • 365.2425 days — the average length of a year in the Gregorian calendar
  • 365.25 days — the average length of a year in the Julian calendar
  • 365.2564 days — a sidereal year
  • 366 days — a leap year in many solar calendars; 31.62 million seconds
  • 373.59 days — half-life of ruthenium-106
  • 383, 384 or 385 days — the lengths of leap years in some lunisolar calendars
  • 383.9 days — 13 lunar months; leap year in some lunisolar calendars
  • 396.1 days — half-life of neptunium-235
  • 462.6 days — half-life of cadmium-109
  • 1.88 years — one orbit of Mars
  • 1.92 years — half life of thulium-171
  • 100 megaseconds = 3.2 years
  • Longer times

See also

  •  • [ e] Orders of magnitude (time), by powers of seconds
Negative powers 10−44 s | ... | 10−25 s | 10−24 s ... 10−22 s | 10−21 s ... 10−19 s | 10−18 s ... 10−16 s | 10−15 s ... 10−13 s | 10−12 s | 10−11 s | 10−10 s | 10−9 s | 10−8 s | 10−7 s | 10−6 s | 10−5 s | 10−4 s | 10−3 s | 10−2 s | 10−1 s
Positive powers 1 s | 10 s | 102 s | 103 s | 104 s | 105 s | 106 s | 107 s | 108 s | 109 s | 1010 s | 1011 s | 1012 s | 1013 s |1014 s | 1015 s | 1016 s | 1017 s | 1018 s | 1019 s and more
An order of magnitude is the class of scale or magnitude of any amount, where each class contains values of a fixed ratio to the class preceding it. The ratio most commonly used is 10.
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day (symbol: d) is a unit of time equivalent to 24 hours. It is not an SI unit but it is accepted for use with SI.[1] The SI unit of time is the second. The term comes from the Old English dæg.

Definitions

The day has several definitions.
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second (SI symbol: s), sometimes abbreviated sec., is the name of a unit of time, and is the International System of Units (SI) base unit of time.

SI prefixes are frequently combined with the word second to denote subdivisions of the second, e.g.
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To help compare orders of magnitude of different times this page lists times between 106 seconds and 107 seconds (approximately 11.6 days and 116 days). A megasecond is one million seconds. See also times of other orders of magnitude.
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For , see .
The half-life of a quantity, subject to exponential decay, is the time required for the quantity to decay to half of its initial value.
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Thulium (IPA: /ˈθuːliəm/) is a chemical element that has the symbol Tm and atomic number 69. A lanthanide element, thulium is the least abundant of the rare earths.
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4, 2
(amphoteric oxide)
Electronegativity 2.0 (scale Pauling)
Ionization energies 1st: 812.1 kJ/mol
Atomic radius 190 pm
Atomic radius (calc.) 135 pm
Miscellaneous
Magnetic ordering nonmagnetic
Electrical resistivity (0 C) (α) 0.
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VENUS is an acronym for the Victoria Experimental Network Under the Sea . The VENUS project is operated out of the University of Victoria and is an advanced cabled sea floor observatory, consisting of fibre optic cables connecting oceanographic instruments on the sea floor of the
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2, 3
(amphoteric oxide)
Electronegativity 1.88 (Pauling scale)
Ionization energies
(more) 1st: 760.4 kJmol−1
2nd: 1648 kJmol−1
3rd: 3232 kJmol−1

Atomic radius 135 pm
Atomic radius (calc.
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5
(amphoteric oxide)
Electronegativity 1.63 (Pauling scale)
Ionization energies
(more) 1st: 650.9 kJmol−1
2nd: 1414 kJmol−1
3rd: 2830 kJmol−1

Atomic radius 135 pm
Atomic radius (calc.
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3, 4
Electronegativity 1.3 (scale Pauling)
Ionization energies 1st: 608 kJ/mol
Miscellaneous
CAS registry number 7440-71-3
Selected isotopes
Main article: Isotopes of californium
iso NA half-life DM DE (MeV) DP
248Cf syn 333.
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lunisolar calendar is a calendar in many cultures whose date indicates both the moon phase and the time of the solar year. If the solar year is defined as a tropical year then a lunisolar calendar will give an indication of the season; if it is taken as a sidereal year then the
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lunar calendar is a calendar in many cultures that is oriented at the moon phase.

This is normally done by having a month which corresponds to a lunation so that the day of month indicates the moon phase. If a calendar tracks the seasons, it is also a lunisolar calendar.
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A year (from Old English gēr) is the time between two recurrences of an event related to the orbit of the Earth around the Sun. By extension, this can be applied to any planet: for example, a "Martian year" is the time in which Mars completes its own orbit.
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solar calendar is a calendar whose dates indicate the position of the earth on its revolution around the sun (or equivalently the apparent position of the sun moving on the celestial sphere).
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20th century - 21st century
1970s  1980s  1990s  - 2000s -  2010s  2020s  2030s
1997 1998 1999 - 2000 - 2001 2002 2003

2000 by topic:
News by month
Jan - Feb - Mar - Apr - May - Jun
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A tropical year (also known as a solar year) is the length of time the Sun, as seen from the Earth, takes to return to the same position along the ecliptic (its path among the stars on the celestial sphere) relative to the equinoxes and solstices.
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Gregorian calendar is the most widely used calendar in the world. A modification of the Julian calendar, it was first proposed by the Calabrian doctor Aloysius Lilius, and was decreed by Pope Gregory XIII, for whom it was named, on 24 February 1582 via the papal bull
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Julian calendar was a reform of the Roman calendar which was introduced by Julius Caesar in 46 BC and came into force in 45 BC (709 ab urbe condita). It was chosen after consultation with the astronomer Sosigenes of Alexandria and was probably designed to approximate the
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The sidereal year is the time taken for the Sun to return to the same position with respect to the stars of the celestial sphere. It is the orbital period of Earth, equal to 365.25636042 mean solar days (31,558,149.540 seconds), that is 365.25636042 earth rotations or sidereal days.
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For the 1921 film starring Fatty Arbuckle, see .
A leap year (or intercalary year) is a year containing one or more extra days (or, in case of lunisolar calendars, an extra month) in order to keep the calendar year synchronised with the
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4, 6, 8
(mildly acidic oxide)
Electronegativity 2.2 (scale Pauling)
Ionization energies 1st: 710.2 kJ/mol
2nd: 1620 kJ/mol
3rd: 2747 kJ/mol
Atomic radius 130 pm
Atomic radius (calc.
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5, 4, 3
(amphoteric oxide)
Electronegativity 1.36 (scale Pauling)
Ionization energies 1st: 604.5 kJ/mol
Atomic radius 175 pm
Miscellaneous
Magnetic ordering ?
Electrical resistivity (22 °C) 1.220 µΩ·m
Thermal conductivity (300 K) 6.
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Cadmium (IPA: /ˈkædmiəm/) is a chemical element in the periodic table that has the symbol Cd and atomic number 48.
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Mars  

Mars as seen by the Hubble Space Telescope
Orbital characteristics
Epoch J2000<ref name="nssdc" />
Aphelion distance: 249,228,730 km
1.66599116 AU
Perihelion distance: 206,644,545 km
1.
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Thulium (IPA: /ˈθuːliəm/) is a chemical element that has the symbol Tm and atomic number 69. A lanthanide element, thulium is the least abundant of the rare earths.
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108 seconds and 109 seconds). See also times of other orders of magnitude.
  • Shorter times
  • 3.3 years -- half life of rhodium-101
  • 4 years -- full term of the President of the United States
  • 4.6 years -- orbital period of Ceres
  • 5.

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Seconds

Orders of magnitude (time)
Factor (s) Multiple common units orders of magnitude
10−43 Planck time, the shortest physically meaningful interval of time, and consequently the youngest the known universe can be measured. ≈ 5.
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Seconds

Orders of magnitude (time)
Factor (s) Multiple common units orders of magnitude
10−43 Planck time, the shortest physically meaningful interval of time, and consequently the youngest the known universe can be measured. ≈ 5.
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Exponentiation is a mathematical operation, written an, involving two numbers, the base a and the exponent n.
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