Wednesday, October 29, 2008
Earth's Atmosphere
Earth's atmosphere is contains many elements that most planets don't have. The atmosphere is made up of oxygen,nitrogen, carbon dioxide, water vapor, and particles of liquids and solids. The atmosphere has one percent of other gases. Earth is suitable for living because of how much oxygen it has. The two main gases in the atmosphere are nitrogen and oxygen. Planets like the moon don't have these gases therefor there isn't life on any of them. If Earth's atmosphere didn't have the gases that it does we wouldn't be living here today.
Wednesday, October 8, 2008
Sunday, October 5, 2008
Space Exploration
The Science Of Rockets
NASA has used rockets to launch probes int space since the 1950's. The robots are mad eup of three stages in oreder to make it to space. The first stage, Atlas, uses solid-fuel bosters and liquid-fuel enigines to launch the satelite into space. The second stage known as Centaur, uses liquid-fuel engines to make sure it orbits in space corectly. The third stage is the payload, the payload which is the satalite or spacecraft carried up to space by the rocket. The Atlas rockets have been upgraded many times. They're used to go to planets and discovernew things about our solar system.
The Space Program
NASA has lanched many spacecrafts into space to study and learn more things about the moon. They have launched different ones for different things. Although they have upgraded the spacecrafts, things still have one wrong, like with Apollo 13, an oxegyn tank burst, but they were still sucessful with the things they brought back to earth from the moon.
Exploring Space Today
The ISS has a small robot called a "personal satelite assistant". It tells astronauts on the moon if something is going wrong or isn't right. It's powered by solar cells. It monitors temperature, pressure, and air quality. It has a video phone to help astronauts communicate wit each other and is linked to mission control on Earth.
Using Space on Earth
NASA wanted money to go to the Space Program and every dollar that was invested, the U.S. economy receives a seven dollar return in the form of job ivention, economic growth, and taxes. But, many people argued that the money could be used for many things that they needed. Some of these needed things are medical care
NASA has used rockets to launch probes int space since the 1950's. The robots are mad eup of three stages in oreder to make it to space. The first stage, Atlas, uses solid-fuel bosters and liquid-fuel enigines to launch the satelite into space. The second stage known as Centaur, uses liquid-fuel engines to make sure it orbits in space corectly. The third stage is the payload, the payload which is the satalite or spacecraft carried up to space by the rocket. The Atlas rockets have been upgraded many times. They're used to go to planets and discovernew things about our solar system.
The Space Program
NASA has lanched many spacecrafts into space to study and learn more things about the moon. They have launched different ones for different things. Although they have upgraded the spacecrafts, things still have one wrong, like with Apollo 13, an oxegyn tank burst, but they were still sucessful with the things they brought back to earth from the moon.
Exploring Space Today
The ISS has a small robot called a "personal satelite assistant". It tells astronauts on the moon if something is going wrong or isn't right. It's powered by solar cells. It monitors temperature, pressure, and air quality. It has a video phone to help astronauts communicate wit each other and is linked to mission control on Earth.
Using Space on Earth
NASA wanted money to go to the Space Program and every dollar that was invested, the U.S. economy receives a seven dollar return in the form of job ivention, economic growth, and taxes. But, many people argued that the money could be used for many things that they needed. Some of these needed things are medical care
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