1. This work will be about spaceships and space shuttles. Day: 10/9/2012. Work made proudly by David Santiago Pellicer Zubeldía. It’s written in English because I feel comfortable to practice it right now.

2. Kinds of spaceships There are many kinds of spaceships, they have been mainly developed by USA, Russia and France. These are the most important spaceships and space shuttles, from the beginning of the space exploration era, over the 50s and 60s: -Saturn V: This rocket was used between 1967-1973. It was the most powerful rocket in those days, it weighted 2,900 tonnes and had a push force of 3,500 tonnes. It was fueled up by hydrogen and liquid oxygen. -Energy: This Soviet rocket was really good, it blasted-off between 1987-1988. It weighted 2,400 tonnes and had a push force of 3,060 tonnes. It was fueled up by oil (kerosene) -Space shuttle: This invention was created by USA, it has been launched from 1981 until 2011. The weight is 1,835 tonnes and has a push force of 3,030 tonnes. It has always been fueled up by aluminum, ammonium, hydrogen and some else fuels. -Delta IV: This is a disposable shuttle designed by USA to put satellites into orbit. This invention has been used from 2002 and it’s still used. Its weight is 733 tonnes and its push force is 884 tonnes. It’s fueled up by hydrogen and liquid oxygen. -Soyuz U: This Soviet rocket it’s created for flights with crew or without any crew. It was created in 1973, being still used. It weights 313 tonnes and its push force is 411.1 tonnes.

3. Velocity needed by a rocket to get out of the Earth. A medium rocket between 700 and 1000 tonnes, with a lot of tonnes of fuel (already included in the weight), needs 40,320 kilometres per hour (25200 miles per hour) to get out of the Earth. The comsomption of fuel will be really high during this maneuver, it will finally have 20 tonnes of fuel left.

4. How does a spaceship travel among the differnt planets? When a spaceship gets out of the Earth, it doesn’t need any fuel, because nothing in the space can stop it (unless it crashes into something). Nothing can stop it because there is no air in the space, so the space shuttle moves with the same velocity it started to move. It doesn’t even waste any fuel to move into the space. A spaceship just needs the fuel when it is getting out of the Earth because there is air there which stops it. Once in the space, it moves with the same velocity it had reached previously getting out of the Earth.

5. Bibliography http://red-estelar.webcindario.com/Tipos- de-naves-espaciales.htmlhttp://red-estelar.webcindario.com/Tipos- de-naves-espaciales.html http://86400.es/2009/03/09/40320-kmh- para-salir-fuera/http://86400.es/2009/03/09/40320-kmh- para-salir-fuera/ http://www.circuloastronomico.cl/seccione s/iramarte.html