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A spacecraft is a craft or machine designed for spaceflight. Spacecraft are used for a variety of purposes, including communications, earth observation, meteorology, navigation, planetary exploration and space tourism. Spacecraft and space travel are common themes in works of science fiction. On a sub-orbital spaceflight, a spacecraft enters space and then returns to the surface, without having gone into an orbit. For orbital spaceflights, spacecraft enter closed orbits around the Earth or around other celestial bodies. Spacecraft used for human spaceflight carry people on board as crew or passengers, while those used for robotic space missions operate either autonomously or telerobotically. Robotic spacecraft used to support scientific research are space probes. Robotic spacecraft that remain in orbit around a planetary body are artificial satellites. Only a handful of interstellar probes, such as Pioneer 10 and 11, Voyager 1 and 2 , and New Horizons, are currently on trajectories that leave our Solar System. From Wikipedia under the
GNU Free Documentation License  snowboard-revolution.com 400px x 600px | 87.00kB [source page] Spacecraft Wallet Spacecraft belt  astro.ysc.go.jp 1024px x 681px | 114.60kB [source page] Credit nasa gsfc c meaney Courtesy of jaxa solar b From Yahoo Image Search: "Spacecraft"  universetoday.com Nancy Atkinson Fri, 05 Sep 2008 18:33:10 GM This has to be the sexiest looking . spacecraft. ever built by humankind. No, it's not a starship or battle cruiser (although it does look a little like the. From Google Blog Search: "Spacecraft"  redorbit.com Sun, 20 Dec 2009 12:40:10 PST This video shows the WISE (Wide Field Survey Explorer) vehicle and spacecraft flow. credit: NASA. redorbit.com.  youtube.com Wed, 17 Oct 2007 07:41:07 PDT This is the Cassini spacecraft, currently in orbit around Saturn. It released the probe, Huygens, which descended to Titan's surface in ... youtube.com.  sci.esa.int Thu, 11 Jun 2009 13:25:20 PDT September 2008 the Rosetta spacecraft will make its closest approach to asteroid Steins. Preparations are underway to ready the spacecraft for ... sci.esa.int. From Google Video Search: "Spacecraft"  news.google.com Mon, 28 Jun 2010 23:30:28 GMT+00:00 returns from asteroid mission, years overdue Washington Post By the time its odyssey ended this month in the Australian outback, the spacecraft Hayabusa had been gone three years longer than planned, ... NASA hands down a secret mission to three high schoolers? dvice nasa asks Three High School Students For Help Geeky gadgets Japanese spacecraft's return from asteroid mission called 'incredible feat' Dallas Morning News Coolest Gadgets - Nature.com news.google.com Wed, 30 Jun 2010 10:07:38 GMT+00:00 Jamaica Observer 1971: Three Soviet cosmonauts, in space for more than three weeks, are found dead when their Soyuz 11 spacecraft lands. A leak had caused their craft to ... news.google.com Wed, 23 Jun 2010 16:36:33 GMT+00:00 Ever Before It's News For spacecraft that zoom through the cosmos at thousands of miles per hour, calculating which one is traveling at the fastest speed is more complicated than ... From Google News Search: "Spacecraft" How much energy to send a spacecraft into a new orbit? Q. What is the least amount of energy it takes to send a spacecraft of mass 3.50 104 kg from Earth's orbit to that of Mars? (Neglect the gravitational influence of the planets themselves.) Assume that both planetary orbits are circular, the radius of Earth's orbit is 1.50 1011 meters, and that of Mars' orbit is 2.28 1011 meters. The Sun's mass is 1.99 1030 kg Asked by Laura G - Sun Nov 1 07:02:10 2009 - - 1 Answers - 0 Comments A. Simply calculate the difference in gravitational potential energy from the sun at both locations. U = GMm/r^2 thus Ue(for earth's orbit) = G*Ms*m / (Re)^2 (Where Ms is the mass of the sun, m is the mass of the spacecraft, and Re is the distance between the sun and earth) Um = G*Ms*m / (Rm)^2 (same, but Rm is distance from sun to Mars) Ue-Um is then the energy that you need to add. When i plug in numbers i get about 117 J. This is small, but that is to be expected when neglecting the gravity of the planets themselves. Hope this is what you needed :) Answered by Michael - Tue Nov 3 17:54:53 2009 When spacecraft enter Earth's atmosphere. What type of friction do the air molcules it is bombarded create? Q. Please help these are the answers I have been given to choose from: a huge amount of heat. Astronauts are protected from this by thermal insulation on the outside of the spacecraft, gravity to force the spacecraft back into space, a soft and easy landing. Thanks! Asked by Amazir A - Fri May 9 00:37:05 2008 - - 1 Answers - 0 Comments A. A huge amount of heat. Astronauts are protected from this by thermal insulation on the outside of the spacecraft. Answered by Shant - Fri May 9 01:36:10 2008 What is the direction of the acceleration of the spacecraft in the case of 10.0 kN thrust?
Q. A spacecraft descends vertically near the surface of Planet X. An upward thrust of 25.0 kN from its engines slows it down at a rate of 1.20 m/s^2, but if an upward thrust of only 10.0 kN is applied, it speeds up at a rate of 0.80 m/s^2. What is the direction of the acceleration of the spacecraft in the case of 25.0 kN thrust?Apply Newton's second law to each case, slowing down or speeding up, and use this to find the spacecraft's weight near the surface of Planet X. Asked by Natiphy2007 - Tue Oct 9 13:04:44 2007 - - 1 Answers - 0 Comments A. I believe the information you are seeking can be reviewed in the source I have cited for you below. This should provide a good explanation to assist you. Good luck! Answered by unknown - Mon Oct 15 23:39:09 2007 From Yahoo Answer Search: "Spacecraft" |
