Solar Spacecraft
Increasing the momentum using solar sails?
Hey, if u have a spacecraft with a solar sail of 1000m^2, and u want to double the acceleration of the craft without increasing the size of the sail...how do you do this?
My guess is to make it reflective...but i don't understand how that would double the acceleration, can someone please explain why?
So basically the acceleration is much greater when the photons are reflected than when it is absorbed by the black?
When you throw a ball at a wall, it comes back to you, right? It's because the wall exerted a force on the ball, it changed the momentum.
[Rate of change is momentum!]
Now, by Newton's third law of motion, it is evident that the ball also exerted some force on the wall. Well, if the wall causes a more sharp change in momentum, it'll experience more force from the ball.
Use the same analogy and yes - it's not a far fetched analogy. Both of the situations will require almost the same questions to analyze!
Closest-Ever Probe of Sun is New NASA Mission
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Ring shadows on Saturn, Cassini image Photo Mugs Ring shadows on Saturn, Cassini image. Saturns rings are seen nearly edge-on across lower frame. Due to the high inclination of Saturn to the Sun at this time, the shadows of the rings are widely spread across its clouds at upper left. The varying densities of the rings are responsible for the varying darkness of the shadows. This image was taken on 4th May 2005, when Cassini was around 999, 000 k... |
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Apollo 12 spacecraft view of solar eclipse Photo Mugs Apollo 12 spacecraft view of a solar eclipse seenfrom space, showing the outline of Earth about toobscure the Sun. The photograph was taken during aflight to the moon in 1969..... |
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Artwork of Deep Impact mission encountering comet Photo Mugs Deep Impact probe. Image 1 of 3. Illustrationof the Deep Impact space probe firing an impactorto- wards the nucleus of comet Tempel 1 (lowerleft). The 500 kilogram impactor, travelling at 10kilometres per second, will blast a large craterin the comet and eject material into space. Sens-ors on the space probe will monitor the explosion.The material inside the comet will be unchangedsince the beginn... |
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Alien Planet $2.81 "A spacecraft from another solar system invades the night sky. But this is not our sky, and we are the invaders. The search for alien life has begun." So begins Alien Planet, a Discovery Channel production that combines cutting-edge computer animation and video technology, interspersed with interviews of top scientists and filmmakers (Stephen Hawking and George Lucas, among others), to examine wha... |
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Alien Planet $6.99 Using state-of-the-art computer graphics, this fascinating speculative documentary dramatizes what might happen if and when we discover life on other worlds. The film follows three robotic probes sent to a planet with a binary sun and gravity comparable to Earth's where they find a thriving ecosystem supporting a vast array of organic life. Features commentary by Stephen Hawking, NASA Chief Scient... |
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The Day Time Ended $4.57 Radiation from a supernova sends a family living in a solar-powered house in the desert into a bizarre time-space warp that finds them confronting dinosaurs, tiny aliens, a green pyramid and other phenomena. Jim Davis, Dorothy Malone, Chris Mitchum star. AKA: "Vortex." 90 min. Standard; Soundtrack: English stereo.... |
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I Heart (Love) Solar Winds Kids T Shirt In 5 Colors 2T thru Youth XL Great looking 100% cotton shirt. Please refer to our sizing chart for measurements.This design also available as a men's or women's tee shirt, and a men's hoodie and sweat shirt in our other amazon.com listings.... |
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Orion (Spacecraft) $89.22 High Quality Content by WIKIPEDIA articles Orion is a spacecraft design currently under development by the United States space agency NASA. Each Orion spacecraft will carry a crew of four to six astronauts. The spacecraft is designed to be launched by the Ares I, a launch vehicle, also currently under development. Both Orion and Ares I are elements of NASAs Project Constellation, which plans to send human explorers back to the Moon by 2020, and then onward to Mars and other destinations in the Solar System. On August 31, 2006, NASA awarded Lockheed Martin (LM) the contract to design, develop, and build Orion. Author: Surhone, Lambert M./ Timpledon, Miriam T./ Marseken, Susan F. Binding Type: Paperback Number of Pages: 134 Publication Date: 2010/05/19 Language: English Dimensions: 5.98 x 9.01 x 0.31 inches |
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Lander (Spacecraft) $125.85 A lander is a spacecraft which descends toward and comes to rest on the surface of an astronomical body. For bodies with atmospheres, the landing is called atmospheric reentry and the lander descends as a reentry vehicle. In these cases landers may employ aerobraking and parachutes to slow down, often with small landing rockets which fire just before impact to bring the lander to rest relatively gently. The Mars Pathfinder mission also used inflatable airbags to cushion the landers impact. When a high velocity impact is planned, the spacecraft is called an impactor. Several terrestrial bodies have been subject of lander and/or impact exploration: among them the planets Mars and Venus and the Saturn moon Titan. Of the inner Solar System planets, Mercury is the only one yet to be visited by a lander. Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 204 Publication Date: 2010/04/23 Language: English Dimensions: 5.98 x 9.01 x 0.46 inches |
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Kepler (Spacecraft) by Yoan, Niek [Paperback] $87.62 Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Kepler Mission is a NASA program supported by a space observatorythe Kepler spacecraftdesigned to discover Earthlike planets orbiting other stars. The spacecraft is named in honor of German astronomer Johannes Kepler. The spacecraft was launched on March 7, 2009, with a planned mission lifetime of at least 3.5 years. Kepler uses a photometer developed by NASA to continuously monitor the brightness of over 145,000 main sequence stars in a fixed field of view. The data collected from these observations will be analyzed to detect periodic fluctuations that indicate the presence of extrasolar planets (planets outside our solar system) that are in the process of crossing the face of other stars. Author: Yoan, Niek Binding Type: Paperback Number of Pages: 104 Publication Date: 2011/05/25 Language: English Dimensions: 9.02 x 5.98 x 0.25 inches |
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Huygens (Spacecraft) by Avery, Iustinus Tim [Paperback] $89.22 Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Huygens probe was an atmospheric entry probe carried to Saturns moon Titan as part of the CassiniHuygens mission. The probe was supplied by the European Space Agency and named after the Dutch 17th century astronomer Christiaan Huygens. The combined CassiniHuygens spacecraft was launched from Earth on October 15, 1997. Huygens separated from the Cassini orbiter on December 25, 2004, and landed on Titan on January 14, 2005 near the Xanadu region. This was the first landing ever accomplished in the outer solar system. It touched down on land, although the possibility that it would touch down in an ocean was also taken into account in its design. Even though it was never officially designated a lander, the probe continued to send data for about 90 minutes after reaching the surface. Author: Avery, Iustinus Tim Binding Type: Paperback Number of Pages: 120 Publication Date: 2011/06/03 Language: English Dimensions: 9.02 x 5.98 x 0.28 inches |
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