Planet Mercury is the nearest planet to the sun in the whole solar system with the distance of 58 million kilometers .
Scientific observations showed planet mercury terrain to be just like that of the Earth’s moon with large craters. These craters were formed in the earliest making of the universe, when meteoroids showered on their surfaces.
Since then, these hollow lands have preserved their shape because neither there is geophysical activity, nor atmospheric cycle going on t.
It takes just 88 earth days for the planet Mercury to orbit the Sun !
Such a fast orbit is required to generate enough centrifugal force to balance the sun’s gravitational pull.
Had planet mercury not circumambulated quick , it would have fallen down on to the sun!
Further mercury facts include 59 earth days taken to rotate on its axis! Such a slow rotation! against the Earth’s 24 hour rotation period.
Mercury’s axis is non tilted as compared to earth’s tilt of 27 degrees.
Summing up all the above-mentioned facts about Mercury means, a person there will experience just 3 days and nights in every 2 years!
Such a long day and night is a prime reason for severe temperature volatility, with day time temperatures approaching 350 c, more than the melting point of lead, while the night time temperature freezing down to around -150 c. Impossible for the astronauts to survive there without protective shielding.
4 seasons here on earth are caused by the axial tilt of the earth.
Different places receiving different sunshine is the reason north and south hemisphere do not simultaneously face the same season.
Planet Mercury, being non tilted, does not seasonally vary and its north and south hemisphere has fixed duration of days and nights throughout the year, unlike the Earth.
Being the smallest planet among all the neighbors, planet Mercury’s mass is not big enough to gravitation-ally hold atmospheric gases around it .
Thus, planet Mercury can not sustain life as there is no oxygen, no air to generate winds and water.
Lack of air/atmosphere is another reason for such extremes of temperature on Planet Mercury’s surface.
Gases above the earth moderate the environment below it by absorbing solar heat during day time and stopping the lands, at night, radiating out heat in deep space. Such a natural facility is unavailable on the dead planet!
Like its other terrestrial neighbors, its core and mantle is made up of iron and silicon compounds, respectively.
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