Mars The Forth Planet........
Mag.1.0 Dia.5.70"
Mag.1.0 Dia.5.70"
If Venus is Earth's sister planet, Mars is a smaller brother, half the size of Earth. It has many Earthlike features, including an atmosphere with clouds and ice deposits at its poles, called POLAR CAPS. It rotates in 24.5 h.(hours), about the length of Earth's day. Unfortunately for the proposed family resemblance as well as for future manned exploration, the atmosphere is very thin, cold, and dry. Compared to Earth's sea level surface pressure of 1000 mbr (millibars), Mars surface pressure in most regions is about 5 to 8 mbr and would require visitors to wear a spacesuit. Martian ground temperature exceeds freezing only on the warmest summer days though the air temperature usually stays below freezing) and the air has only minuscule traces of water vapor. There is no liquid water, all the water of the planet is in the form of ice and water molecules trapped in the minerals. The famous red SURFACE COLORATION is caused by oxidized iron minerals, or rust like material. This color is prominent even when Mars is viewed with the naked eye from Earth............
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