physics/rocketry |= qce-ae |_ interstellar-travel_nuclear-pulse-propulsion | fission-fusion-powered_spacecraft | project-orion-medusa
42 videos • 338 views • by taiyc1 info-n-math-below |= with end of photosynthesis n survival of humanity at stake its still doable/worth-a-try _ How much Uranium and/or Thorium will we need per year? 1 tonne of either uranium or thorium, can produce a gigawatt year of electricity (1GWye), the amount you’ll need to power a modern city with a million inhabitants for a year. https://www.daretothink.org/how-much-... 1 tonne of uranium = 1gwye = 1 million in habitants for 1 yr interstellar travel = 100 years = 100tonnes of uranium Project Orion concept of propulsion by nuclear pulses has been proposed. The largest spacecraft design analyzed in Project Orion had a 400 m diameter and weighed approximately 8 million tons. It could be large enough to host a city of 100,000 or more people. Interstellar ark https://en.wikipedia.org/wiki/Interst... earth total uranium = around 40 trillion tons uranium can be mined on mars if run out on earth= It has been a long standing paradox that uranium, thorium and potassium, appear hyper-abundant on Mars surface. A thin debris layer on the surface of Mars, enriched in Th, K and U , and dispersed by some impact or explosion. Thorium and radioactive potassium appear concentrated in the northern Mare Acidalium and Utopia Planum https://www.hou.usra.edu/meetings/lps... _ breakthrough-starshot/project-daedalus-n-reconissance |- The Breakthrough Starshot program aims to demonstrate a proof-of-concept for ultra-fast, light-driven nano-spacecraft, and lay the foundations for a first launch to Alpha Centauri within the next generation. The spacecraft would make a flyby of, and, possibly photograph any Earth-like worlds that might exist in the system. (analysis of atmosphere) https://en.wikipedia.org/wiki/Breakth... additional knowledge can be learned that can only be obtained by such close encounters. astronomical remote sensing should be pursued in parallel with in-situ reconnaissance missions by robotic probes. https://www.researchgate.net/publicat... _ minimalism |= From analysis, a minimum of 98 people would be needed to accomplish a multi-generational mission to another star system, without risks of genetic disorders and other negative effects associated with inter-marrying. For this study, the team addressed the equally important question of how to feed the crew. These values also provide some architectural constraints for the minimum size of the generation ship itself. Assuming ship were designed to generate artificial gravity by centripetal force (i.e. a rotating cylinder) the would need be a minimum of about 224 meters (735 feet) in radius and 320 meters (1050 feet) in length. “Of course, other facilities besides farming are necessary – human habitation, control rooms, power generation, reaction mass and engines, which make the spaceship at least twice larger,” Dr. Marin added. “Interestingly, even if we double the length of the spaceship, we find a structure that is still smaller than the tallest building in the world – Burj Khalifa (828 m; 2716.5 ft).” https://www.universetoday.com/141407/... _ "Momentum Limited" Orion Ship diameter (meters) = 100 m Mass of empty ship (tonnes) = 100,000 t (incl. 50,000 t structure+payload) +Number of bombs = total bomb mass (each 1 Mt bomb weighs 1 tonne) = 300,000 =Departure mass (tonnes) = 400,000 t Maximum velocity (kilometers per second) = 10,000 km/s (=3.3% of the speed of light) Mean acceleration (Earth gravities) = 1 g (accelerate for 10 days) Time to Alpha Centauri (one way, no slow down) = 133 years Estimated cost = 0.1 year of U.S. GNP $0.367 Trillion Later studies indicate that top cruise velocity that can theoretically be achieved are a few percent of the speed of light (0.08–0.1c).An atomic (fission) Orion can achieve perhaps 9%–11% of speed of light. The concept of using a magnetic sail to decelerate the spacecraft as it approaches its destination has been discussed as an alternative to using propellant; this would allow ship to travel near the maximum theoretical velocity. https://en.wikipedia.org/wiki/Project...) _ how to stop and start a pulse nuclear interstellar spaceship/project-orion-medusa design= to accelerate= launch nukes behind ship or in front of ship with a solar-sail/pusher-plate in front to decelerate= launch nukes in front of ship of in behind of ship with a solar-sail/pusher-plate behind _ picture/cover-from= https://i.redd.it/5gxqiarkfgcy.jpg https://i.imgur.com/2mCyvrT.png _ play-space-engine!!!