The atmosphere of mars mainly consists of carbon dioxide
The core region of earth contains molten mass consisting of iron, magnesium, silica, etc
Ozone layer of the atmosphere protects us from ultraviolet rays of sun
Mercury and Venus do not have natural satellites
The sun rises in the west on Venus because unlike other planets Venus spins in the opposite direction (i.e. from east to west).
The atmosphere of Venus contains carbon dioxide gas.
The day temperature of mercury is about 427°C and its night temperature is about (-173) °C.
Mercury, Venus, Earth and Mars are the terrestrial planets
Hydrogen and helium are chiefly the constituent elements of sun
The mass of sun is about 1.99 x 1030 kg