We know that it's the only slightly bigger than our own Earth's Moon.It's also the closest and the first position from our Solar System planet.During the long period of 58-HOUR[1 year:88 days,the surface of the planet will be super heated until 430*C[800*F] and cooled down in night.It's temperature can drop as low as -180*C[-300*F].Despite from it's proximity to the Sun,the planet's reflective surface and lack of atmosphere mean it isn't the most hottest planet[but Venus and the planet has it's own dubious honor].
Image:Mercury air composition
Image:Mercury Day and Night Temperature
NASA(NATIONAL AERONAUTIC SPACE AND ADMINISTRATION) send the Spacecraft to orbit Mercury,MESSENGER.Benefits from MESSENGER:
1.Mapped 99% of the Planet and shield reaches 700*F(360*C)
2.It can detect the Geochemistry of the Mercury
3.Discover more about Mercury's feature.
They explore the Mercury's own gravitational measurement from Messenger and figured that Mercury's own iron core even bigger than previous thoughts.It also revealed the iron core which has an unusually complex structure.Area above it's much denser than rocky mantle,although not denser as iron.IT means the central of the core is encased in a shell of iron sulphide 200 km(125 miles)thick-an unseen situation in another planet.
Image:The crust begin with a blue graph,then mantle start with the green and red graph,thirdly and next are similar to solid iron sulphide and liquid iron outer core.Finally,solid iron inner would be in green colorful graph.THAT'S ALL FOR TODAY,BYEEEEEEEEEEEEE!
To be continued in Chapter 2:Feature of Mercury
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