what are its physical characteristics?
It has a thick silicate mantle around an iron core, a substantial atmosphere, and evidence of internal geological activity. It is much drier than Earth, and its atmosphere is ninety times as dense.
Solar System
has a thick silicate mantle around an iron core, a substantial atmosphere, and evidence of internal geological activity. It is much drier than Earth, and its atmosphere is ninety times as dense. 
earth is what number planet from the sun Third how many planets does this system of sun consists of? Nine what is the history behind the formation of the system? The Solar System formed 4.568 billion years ago from the gravitational collapse of a region within a large molecular cloud. which among the nine planets is the hottest? Venus
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Solar System [SEP] Venus
Venus (0.7 AU from the Sun) is close in size to Earth () and, like Earth, has a thick silicate mantle around an iron core, a substantial atmosphere, and evidence of internal geological activity. It is much drier than Earth, and its atmosphere is ninety times as dense. Venus has no natural satellites. It is the hottest planet, with surface temperatures over , most likely due to the amount of greenhouse gases in the atmosphere. No definitive evidence of current geological activity has been detected on Venus, but it has no magnetic field that would prevent depletion of its substantial atmosphere, which suggests that its atmosphere is being replenished by volcanic eruptions.