Mercury is the planet closest to the Sun. This dry, rocky world has an atmosphere very thin that it barely exists. It travels around the Sun the fastest, but it spins slowly on its axis. The average temperature is 167°C, but when the planet close to the Sun, the temperature can soar about 462°C.
Venus is a sphere of rock similar in size to the Earth, but there are comparison ends. Venus is a dark, hostile world of volcanoes and suffocating its atmosphere. Its average temperature is higher than other any planet. Its atmosphere is mainly carbon dioxide, sulphur dust and sulphuric acid.
Earth, the third planet from the Sun. The Earth has a thin layer of gas called atmosphere, which protects its surface from the harshness of space. 8its atmosphere also keeps the planet at a comfortable temperature and protects the surface from dangerous radiation. The atmosphere contains nitrogen, oxygen, water and dust.
Mars also called as the
Red Planet. It is composed of dense, rocky material and it is also the fourth planet in
the inner Solar System.