Stephen covey time management matrix pdf

However, it is yet uncertain whether asteroid mining will develop to attain the volume and composition needed in due time to fully compensate for dwindling terrestrial reserves. Today, these metals are mined from Earth’s crust, and they are essential for economic stephen covey time management matrix pdf technological progress.

Hence, the geologic history of Earth may very well set the stage for a future of asteroid mining. Although whether these cost reductions could be achieved, and if achieved would offset the enormous infrastructure investment required, is unknown. Some astrophysicists have suggested that if advanced extraterrestrial civilizations employed asteroid mining long ago, the hallmarks of these activities might be detectable. Why extraterrestrials would have resorted to asteroid mining in near proximity to earth, with its readily available resources, has not been explained. Earth space-based facilities, greatly reducing the economic cost of transporting supplies into Earth orbit. In terms of propulsion energy requirements, a mission to a near-Earth asteroid compares favorably to alternative mining missions. However it would require a much longer round-trip to return the material.

Mission costs could be reduced by using the available water from the asteroid. Twelve asteroids made up the initially identified group, all of which could be potentially mined with present-day rocket technology. Earth, and find the technological means to divert their path to avoid such collisions. Given the satellite’s telescopic accuracy, Sentinel’s data may prove valuable for other possible future missions, such as asteroid mining. Bring raw asteroidal material to Earth for use. Process it on-site to bring back only processed materials, and perhaps produce propellant for the return trip. Transport the asteroid to a safe orbit around the Moon, Earth or to the ISS.

This can hypothetically allow for most materials to be used and not wasted. The House of Representatives deleted a line item for the ARP budget from NASA’s FY 2017 budget request. Due to the weak gravitational fields of asteroids, any drilling will cause large disturbances and form dust clouds. Mining operations require special equipment to handle the extraction and processing of ore in outer space.

However, no techniques for refining ore in zero gravity currently exist. Due to the distance from Earth to an asteroid selected for mining, the round-trip time for communications will be several minutes or more, except during occasional close approaches to Earth by near-Earth asteroids. Thus any mining equipment will either need to be highly automated, or a human presence will be needed nearby. Humans would also be useful for troubleshooting problems and for maintaining the equipment. Satellite that would actually land on the asteroid to get a closer analysis of the available resources. Satellite developed for research and finding resources deeper in space. Harvestors voyage out to asteroids to gather hundreds of tons of material for return to high Earth orbit for processing.

Asteroid mining could potentially revolutionize space exploration. The C-type asteroids’s high abundance of water could be used to produce fuel by splitting water into hydrogen and oxygen. This would make space travel a more feasible option by lowering cost of fuel. While the cost of fuel is a relatively insignificant factor in the overall cost for low earth orbit manned space missions, storing it and the size of the craft become a much bigger factor for interplanetary missions.

This limitation is a major factor in the difficulty of interplanetary missions as fuel becomes payload. A mine can be dug into the asteroid, and the material extracted through the shaft. Asteroids with a high metal content may be covered in loose grains that can be gathered by means of a magnet. For asteroids such as carbonaceous chondrites that contain hydrated minerals, water and other volatiles can be extracted simply by heating. The vapor was condensed into liquid water filling the collection containers, demonstrating the feasibility of mining water from certain classes of physically dry asteroids. For volatile materials in extinct comets, heat can be used to melt and vaporize the matrix.

C, then nickel and iron can be removed from the gas again at higher temperatures, perhaps in an attached printer, and platinum, gold etc. Earth by expansion of the supply chain so it needs further study. A study in 2016 again claimed it is possible to complete in just a few decades because of ongoing advances in robotics, and it argued it will provide benefits back to the Earth including economic growth, environmental protection, and provision of clean energy while also providing humanity protection against existential threats. On April 24, 2012 a plan was announced by billionaire entrepreneurs to mine asteroids for their resources.

From there, it could be shipped to Earth orbit for refueling commercial satellites or spacecraft. Platinum and gold are raw materials traded on terrestrial markets, and it is impossible to predict what prices either will command at the point in the future when resources from asteroids become available. Planetary Resources says that, in order to be successful, it will need to develop technologies that bring the cost of space flight down. Planetary Resources also expects that the construction of “space infrastructure” will help to reduce long-term running costs.