earth
The earth is the star where a creature lives thirdly with 1 soon from the sun of the planet of the solar system.
It is classified in "the terrestrial planet" of the quality of rock, and size, mass are greatest in the terrestrial planet of the solar system together.
It is estimated that it passes for about 4,600,000,000 years since I am born by the generation measurement of the meteorite by the radioactive element.
Because the age of the solar system depends on the measurement again in the generation of the meteorite, you may do it when the earth was formed with the birth of the solar system approximately at the same time.
It is thought that it was formed by the collision union of the protoplanet of the Mars size of around 10.
The composition is different by the depth from an earth surface.
Oxygen and silicon are the subject, and metallic elements such as iron / the calcium sodium potassium magnesium are included in the surface of the earth neighborhood aluminum else.
There is it in the form of almost oxide.
For contrast, as for the central part, iron and nickel are the subject.
70% of the earth surface are covered with liquid water (the sea) and intend to be based on nitrogen / oxygen in the ranges from the surface of the earth to sky about 100km very much.
The composition of the atmosphere varies with a high degree.
I draw the orbit of the oval that is almost a circle and revolve around the sun once in 1.0000 solar year and rotate again once in 0.9973 mean solar day.
I say between in time when the sun passes from the spring equinox to the spring equinox namely the cases when seasons pass, and one solar year is 365.2422 days.
I say between time before doing it next in the south after the virtual sun (mean sun) which assumed that I exercise did equal speed over celestial equator in the south with one mean solar day.
I have a shorter it than 1 (a sidereal year) that is defined as time when the earth goes around it around the sun when it was assumed that a fixed star does not move in one solar year so that the spring equinox moves by precessional equinoxes of the earth.
It is 365.25636 days in one sidereal year.
I say 1 with a sidereal day in time before doing it next in the south after the spring equinox did it in the south, and there are some on 1 besides a mean solar day on 1st.
In the dynamics used as an argument at the time in the position calculation of the solar system heavenly bodies for one day when it is used to express one solar year and one sidereal year(Dynamical Time) For one day I am similar, and to be able to put it, there is not the problem particularly even if I think with one mean solar day.
It is classified in "the terrestrial planet" of the quality of rock, and size, mass are greatest in the terrestrial planet of the solar system together.
It is estimated that it passes for about 4,600,000,000 years since I am born by the generation measurement of the meteorite by the radioactive element.
Because the age of the solar system depends on the measurement again in the generation of the meteorite, you may do it when the earth was formed with the birth of the solar system approximately at the same time.
It is thought that it was formed by the collision union of the protoplanet of the Mars size of around 10.
The composition is different by the depth from an earth surface.
Oxygen and silicon are the subject, and metallic elements such as iron / the calcium sodium potassium magnesium are included in the surface of the earth neighborhood aluminum else.
There is it in the form of almost oxide.
For contrast, as for the central part, iron and nickel are the subject.
70% of the earth surface are covered with liquid water (the sea) and intend to be based on nitrogen / oxygen in the ranges from the surface of the earth to sky about 100km very much.
The composition of the atmosphere varies with a high degree.
I draw the orbit of the oval that is almost a circle and revolve around the sun once in 1.0000 solar year and rotate again once in 0.9973 mean solar day.
I say between in time when the sun passes from the spring equinox to the spring equinox namely the cases when seasons pass, and one solar year is 365.2422 days.
I say between time before doing it next in the south after the virtual sun (mean sun) which assumed that I exercise did equal speed over celestial equator in the south with one mean solar day.
I have a shorter it than 1 (a sidereal year) that is defined as time when the earth goes around it around the sun when it was assumed that a fixed star does not move in one solar year so that the spring equinox moves by precessional equinoxes of the earth.
It is 365.25636 days in one sidereal year.
I say 1 with a sidereal day in time before doing it next in the south after the spring equinox did it in the south, and there are some on 1 besides a mean solar day on 1st.
In the dynamics used as an argument at the time in the position calculation of the solar system heavenly bodies for one day when it is used to express one solar year and one sidereal year(Dynamical Time) For one day I am similar, and to be able to put it, there is not the problem particularly even if I think with one mean solar day.
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