Life on Other Planets





Life on Other Planets
As the future proceeds and life begins getting more technical, Earth may not be the only place where the human race resides. There is already talk that some day Mars will be inhabited by humans. Jupiters moon Europa may be the next after that. Two space missions have already studied Mars. The Pathfinder, which landed on the surface of Mars was one of the missions, and the Global Surveyor, which is a satellite, is the other mission. Although Europa has no set missions yet, The Galileo Spacecraft has passed within 364 miles of the moon Europa and has taken images that have given scientist a good look at the surface ("Oceans on Europa" Internet).
The next proposed mission is a vehicle placed in orbit around Europa that would have a radar sounding system designed to look through ice. A further step may be taken by landing a vehicle on the surface. One thing scientist are looking at very hard are ways to get humans to these places. That though will not be a problem because there are already ideas being worked on. One way is Nuclear, it is not liked by a lot of the scientist, but is a way to get humans into space ("The Technologies that will get us to Mars" Internet). Another way is Solar Electric (Ion) propulsion, which uses gases that are electronically charged ("The Technologies that will get us to Mars" Internet). Fusion propulsion is also a good way. It is a very fast method of travel. It works by outputting more power than can be consumed ("The Technologies that will get us to Mars" Internet). The fastest way would be Anti-matter propulsion, which produces a great deal of energy because matter and anti-matter annihilate each other to produce an one hundred percent (100%) mass-for-energy reaction ("The technologies that will get us to Mars" Internet). All of these are ways, one day, humans may be getting to far off places.
Mars, the big red ugly planet, could be the first place humans colonize. First, it would be good to know a little about the martian atmosphere. The atmosphere is 95.3% CO2 with 2.7% nitrogen and 1.6% argon. ("Mars Atmosphere and the Search for Life" Internet). This is similar to Venus\'s atmosphere. The atmosphere is very thin and because of that, the temperatures on Mars vary widely on a daily basis. The covecting troposhere layer varies with location and season also. At night, it practically disappears because the atmosphere becomes very stable. A typical day of weather on Mars would be something like this: light winds from the east in late afternoon, changing to light winds from the southeast after midnight. The maximum winds would be around 15 mph. The temperatures would range from -122F just after dawn to a maximum of -22F and the Pressure would be steady at about 7.7 millibars ("Mars Atmosphere and the Search for Life" Internet). This is what it would be like on Mars most days. Mars also has clouds. Three different kinds have been located so far. First, one is dust clouds which are raised by winds mainly in the summer time ("Mars Atmosphere and the Search for Life" Internet). The second kind of cloud is ice-water clouds and the third kind is CO2 clouds which form a high altitude haze of dry ice crystals ("Mars Atmosphere and the Search for Life" Internet). If believable, the atmosphere on Mars is much clearer than on Earth, except when Mars is having a major dust storm. Atmosphere pressure on Mars can vary up to 20% with the seasons ("Mars Atmosphere and the Search for Life" Internet). Mars is absent of one main thing and that is water. Due to the low pressure, as well as low temperatures the atmosphere can hold very little water vapor. But, with the pressure and temperature as low as it is, it holds about the maximum that is allowed. Humidity on Mars is very large and because of this, it is common to see water vapor fog forming at low elevations at night. One of the main reasons Mars does not have liquid water is because of U.V. radiation from the Sun. the water vapor is broken down into