# Megasecond facts for kids

A **megasecond** is one million seconds. This page lists times between **10 ^{6} seconds** and 10

^{9}seconds, which is about 11.6 days and 0.0317 years.

Ten megaseconds is equal to 115.74 days. 100 megaseconds is equal to 3.2 years.

## Less than a year

- 1.21×10
^{6}seconds = 14 days – a fortnight - 1.38×10
^{6}seconds = 15.9735 days – half life of vanadium-48 - 1.54×10
^{6}seconds = 17.81 days – half life of californium-253 - 2.36×10
^{6}seconds = 27.3217 days – sidereal month - 2.39×10
^{6}seconds = 27.7025 days – half life of chromium-51 - 2.42×10
^{6}seconds = 28 days – length of February in non-leap years - 2.51×10
^{6}seconds = 29 days – length of February in a leap year - 2.59×10
^{6}seconds = 30 days – length of the months April, June, September, and November - 2.68×10
^{6}seconds = 31 days – length of the months January, March, May, July, August, October, and December - 4.45×10
^{6}seconds = 51.5 days – half life of mendelevium-258 - 5.23×10
^{6}seconds = 60.5 days – half life of californium-254 - 6.68×10
^{6}seconds = 77.27 days – half life of cobalt-56 - 7.24×10
^{6}seconds = 83.79 days – half life of scandium-46 - 7.54×10
^{6}seconds = 87.32 days – half life of sulfur-35 - 7.60×10
^{6}seconds = 87 days 23.3 hours – one orbit of Mercury around the Sun - 8.04×10
^{6}seconds = 93.1 days – half life of thulium-168 - 8.68×10
^{6}seconds = 100.5 days – half life of fermium-257 - 128.6 days - half life of thulium-170
- 138 days - half life of polonium- 210
- 224.701 days - one orbit of Venus around the sun
- 271.79 days - half life of cobalt-57
- 280 days - normal length of a human pregnancy; about 24 million seconds
- 330 days - half life of vanadium-49
- 333.5 days - half life of californium-248
- - The value of pi times 10
^{7}seconds is sometimes given as an approximate year value; it works out to 363.61026 days.

## More than a year

- 365 days - a regular year in many solar calendars; about 31.53 million seconds
- 365.2425 days - the normal length of a year in the Gregorian calendar
- 365.25 days - the normal length of a year in the Julian calendar
- 366 days - a leap year in many solar calendars; 31.62 million seconds
- 373.59 days - half-life of ruthenium-106
- 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
- 3.3 years -- half life of rhodium-101
- 4 years—full term of the President of the United States
- 4.37 years—the amount of time it takes for light from Alpha Centauri to reach Earth
- 5.2714 years—half life of cobalt-60
- 6 years—full term of a Senator in the United States
- 10 years—one decade = 3.16 × 10
^{8}seconds - 11 years -- sunspot activity cycle (7.5 to 11 years)
- 11.87 years—one orbit of Jupiter around the sun
- 12.27 years—the amount of time Nazi Germany existed
- 13 years—the normal time is takes to complete K-12 education in the United States.
- 13.08 years—half life of californium-250
- 16.13 years—half life of niobium meta state Nb-93m
- 18.03 years -- Saros cycle, the period of solar eclipses and lunar eclipses
- 29 years—the longest a dog has ever been known to live
- 29.1 years—half life of curium-243
- 29.458 years—one orbit of Saturn around the sun
- 35 years (1.10 × 10
^{9}s) – The youngest a person can be and become the President of the United States - 36 years (1.14 × 10
^{9}s) – the longest a cat has ever been known to live - 63 years (1.99 × 10
^{9}s) – half-life of titanium-44 - 65 years (2.05 × 10
^{9}s) – a normal age for retirement - 68.9 years (2.17 × 10
^{9}s) – half-life of uranium-232 - 74 years (2.34 × 10
^{9}s) – the amount of time communists controlled the Soviet Union - 75 years (2.37 × 10
^{9}s) – average life span of humans in the First World - 84.3 years (2.66 × 10
^{9}s) – one orbit of Uranus around the sun - 100 years (3.16 × 10
^{9}s) – one century - 100.1 years (3.16 × 10
^{9}s) – half-life of nickel-63 - 165 years (5.21 × 10
^{9}s) – one orbit of Neptune - 190 years (6 × 10
^{9}s) – age of the oldest known tortoise - 247.7 years (7.82 × 10
^{9}s) – one orbit of Pluto around the sun - 269 years (8.49 × 10
^{9}s) – half-life of argon-39 - 310 years (9.8 × 10
^{9}s) – one orbit of Makemake around the sun

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Megasecond Facts for Kids. *Kiddle Encyclopedia.*