Author: THE GOLDMINE OF LOST CULTURE
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20m 56sLenght
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This film illustrates the methods that were used for determining space trajectories, locating a spacecraft's position, and navigating both manned and unmanned spacecraft between Earth and other planets. The footage shows, through animation and live photography, the use of computers and other navigational instruments for the lunar mission and future space flights. ► SUBSCRIBE for more films: https://www.youtube.com/user/ibetulookgood Interstellar space travel is manned or unmanned travel between stars. The concept of interstellar travel via starships is a staple of science fiction. Interstellar travel is conceptually much more difficult than interplanetary travel. The distance between the planets in the Solar System is typically measured in standard astronomical units, while the distance between the stars is hundreds of thousands of AU and often expressed in light years. Intergalactic travel, or travel between different galaxies, would be even more difficult. Intergalactic travel is space travel between galaxies. Due to the enormous distances between the Milky Way and even its closest neighbors — hundreds of thousands to millions of light-years — any such venture would be far more technologically demanding than even interstellar travel. Intergalactic distances are roughly one-million fold (six orders of magnitude) greater than their interstellar counterparts. The technology required to travel between galaxies right now is far beyond humanity's present capabilities, and currently only the subject of speculation, hypothesis, and science fiction. Travel for humans, while possible in principle, whether possible in practice is still unknown. However, intergalactic travel is still quite possible within the boundaries of known science. ► SUBSCRIBE for more films: https://www.youtube.com/user/ibetulookgood Challenges of Space Navigation: What are the main challenges for space navigators, and how is navigation through space different from navigation in the air or at sea? Motion Navigators must keep in mind when planning and executing a space mission that everything is moving. Not just the spacecraft, which may be traveling many thousands of kilometers per hour, but also the destination planet or moon. The Earth is rotating and moving around the Sun. Distances Navigators must account for the enormous distances between destinations. If Earth were the size of a softball, the International Space Station would be orbiting just above the seams, the Moon would be a marble about 2 meters (7 feet) away, and Mars would be 1.2 to 2.4 kilometers (.75 to 1.5 miles) away. The targets are small and moving. Communication Deep space missions are limited in the amount of power available for radio communication to and from Earth. Because the spacecraft travel so far from the Sun, they cannot generate as much power from solar panels as Earth satellites can. The radio signals they transmit are very weak and have to be picked out of background noise. The signals may take hours to reach the Earth. So a navigator cannot expect a quick response. Gravity The Sun's gravity determines the basic trajectory of an interplanetary spacecraft. But for deep space missions, a navigator also has to take into account gravitational forces from planets and moons and other forces that might affect the trajectory. ► SUBSCRIBE for more films: https://www.youtube.com/user/ibetulookgood