A Binary System Close to Home: How the Moon and Earth Orbit Each Other

Author(s):  
Douglas W. MacDougal
Keyword(s):  
2006 ◽  
Vol 37 (1) ◽  
pp. 116-122 ◽  
Author(s):  
Patrick Collins
Keyword(s):  
The Moon ◽  

Studia Humana ◽  
2018 ◽  
Vol 7 (2) ◽  
pp. 24-30
Author(s):  
Konrad Szocik ◽  
Bartłomiej Tkacz

Abstract Yuri Gagarin has started the first time in human history the manned mission in space when his Vostok aircraft successfully achieved Earth orbit in 1961. Since his times, human space programs did not develop too much, and the biggest achievement still remain landing on the Moon. Despite this stagnation, there are serious plans to launch manned mission to Mars including human space settlement. In out paper, we are going to identify and discuss a couple of challenges that – in our opinion – will be a domain of every human deep-space program.


Subject Space stations. Significance As Washington returns its sights to the moon, it is reforming its policies regarding the International Space Station (ISS) with a view to jump-starting a 'low-earth orbit economy' in which private firms offer services to corporate clients, foreign governments and wealthy individuals. Impacts China's space station, due for completion in 2022, could draw third-country projects away from commercial US space stations. Governments are more promising clients for commercial crewed spaceflight than 'space tourists' are. Commercial stations and passenger spacecraft could make human spaceflight accessible to allied states. Spaceflight will remain politicised.


2018 ◽  
Vol 20 (1) ◽  
pp. 3
Author(s):  
Osamu Odawara

Space technology has been developed for frontier exploration not only in low-earth orbit environment but also beyond the earth orbit to the Moon and Mars, where material resources might be strongly restricted and almost impossible to be resupplied from the earth for distant and long-term missions performance toward “long-stays of humans in space”. For performing such long-term space explorations, none would be enough to develop technologies with resources only from the earth; it should be required to utilize resources on other places with different nature of the earth, i.e., in-situ resource utilization. One of important challenges of lunar in-situ resource utilization is thermal control of spacecraft on lunar surface for long-lunar durations. Such thermal control under “long-term field operation” would be solved by “thermal wadis” studied as a part of sustainable researches on overnight survivals such as lunar-night. The resources such as metal oxides that exist on planets or satellites could be refined, and utilized as a supply of heat energy, where combustion synthesis can stand as a hopeful technology for such requirements. The combustion synthesis technology is mainly characterized with generation of high-temperature, spontaneous propagation of reaction, rapid synthesis and high operability under various influences with centrifugal-force, low-gravity and high vacuum. These concepts, technologies and hardware would be applicable to both the Moon and Mars, and these capabilities might achieve the maximum benefits of in-situ resource utilization with the aid of combustion synthesis applications. The present paper mainly concerns the combustion synthesis technologies for sustainable lunar overnight survivals by focusing on “potential precursor synthesis and formation”, “in-situ resource utilization in extreme environments” and “exergy loss minimization with efficient energy conversion”.


2020 ◽  
Vol 01 (02) ◽  

Numerous attempts to reduce the cost of launching a satellite into low Earth orbit (LEO) were undertaken in many countries and characterize the current trend to make space projects economically viable and less costly. This is necessary for the progress of the development of our earthly civilization, its evolution according to the plans of the outstanding Russian thinker, the founder of cosmonautics Konstantin E. Tsiolkovsky. Mastering of the Moon and Mars are the necessary steps in the cosmic evolution of earthlings. Unfortunately, this process has not led presently to a sharp decrease in the specific launch cost. The concepts of such task solving are considered in this paper.


2021 ◽  
Vol 19 (73-74) ◽  
Author(s):  
Veaceslav Ursaki ◽  

In relation with the 60th anniversary of the first flight of humans to the space, a retrospective is presented in this paper concerning the development of spatial technologies, starting from the first theoretical concepts of the rocket science and ending with the today's projects of launching humans to other planets. In particular, the competition between the USA and USSR for the first space flight and the human flight to the Moon are analyzed. The technical characteristics of rockets for placing payloads on the low earth orbit and beyond as well as those of the rocket-spaceship systems are discussed.


2020 ◽  
Author(s):  
Elissavet Koumi ◽  
Pavithra Manghaipathy

<p>The Moon Village Association (MVA) is a global organization that aims to foster collaboration between nations, space agencies, industry and the public, in order to facilitate the creation of a Lunar Economy. Despite its name, the purpose of the organization is not to create a base on the Moon. The "Moon Village" is the collection of people and organizations here on Earth that will collectively set Lunar activities in motion.</p> <p>The MVA's pilot mission - sending a Camera to the Lunar Surface to capture images of the earth and recreate the “Overview Effect” - aims to test in action how combining the capabilities of the MVA’s individual and institutional members can lower the entry barrier to the Lunar economy.</p> <p>The technical objective of the mission is to capture and live-stream a video of the Earth for 1 Lunar Day. The data will be broadcasted and utilized to engage the scientific community and general public to maximize mission returns for this and future missions.</p> <p>The challenge:</p> <p>Compared to Earth orbit missions, lunar missions are less prevalent, more technically complex with extra risks and completely different investment scales and timelines. This means that non-institutional space players have fewer opportunities to participate in lunar science and the creation of the Lunar Economy. There is also a lot of untapped capacity in the non-space world: Drawing a parallel to GIS, Sat Comms, Navigation etc., and progress achieved due to publicly accessible space-asset data in non-space industries, the potential benefit of opening up Lunar exploration to more players seems self-evident. The challenge is, however, enabling this global potential.</p> <p> Our talk will address this issue and will be structured to cover the following points:</p> <p>Mission description: We will describe our goals, why we decided to put a camera on the Moon, what are the technical requirements and why we selected the “Overview Effect” as our main objective.</p> <p>MVA Collaboration framework outline: This will address how we combine our varied strengths within the MVA to create a mission and how we want to see our members putting missions together in the future, on their own initiative. </p> <p>The MVA role, the role of volunteers and institutional partners: We will present how the building blocks fit together, what each side offers and receives through this collaboration.</p> <p>Lessons learned from the pre-phase A and phase A of the mission: We will discuss technical, financial, managerial, outreach and public engagement aspects, method-of-working issues, what were the biggest challenges to milestone success and how they were overcome.</p> <p>Obstacles and challenges moving forward: We will address our cost and schedule elements, paths to funding and risk management, and also ethics and responsible culture setting.</p> <p>How can someone get involved: As we are looking to engage both the scientific community and the public, we will be presenting information on where one can stay updated with our work, and what are the options for participation, either as an individual, an institution or a company.</p> <p>The talk will be designed and delivered from First Payload Project team members. The team is made up of both space and non-space industry professionals, all volunteers distributed across multiple time zones, without common working hours and a high chance of most members never meeting in person. The team is supported by the MVA’s institutional members (agencies, educational institutions and industry) in the form of in-kind contributions: an exchange of services, knowledge or materials given by the institutional member due to synergies between the mission objectives and the member’s own scientific or business objectives.</p> <p>This presentation will not focus on technical or scientific objectives or results of the 1st MVA Payload Project but on the process that is being created as a rubric for future lunar projects. From planning to set-up and further, and with the understanding that this is an ongoing process, this talk will present a guide of sorts or in the very least a detailed example of the processes necessary for private-sector lunar missions that deviate from the normal client-supplier models of institutional and Earth orbit missions.</p>


2000 ◽  
Vol 122 (10) ◽  
pp. 62-69
Author(s):  
Benedict J. Gaylo

This article highlights that three approaches for the Apollo mission were considered and investigated early in the program: direct ascent, Earth orbit rendezvous, and lunar orbit rendezvous. Direct ascent would entail a direct shot from Earth to the moon, requiring an enormous rocket assembly, named the Nova rocket that required 15 first stage engines and would dwarf the Saturn V eventually selected as the launch vehicle. It also required a massive lunar landing vehicle to return the astronauts from the moon directly to Earth. At liftoff, the first stage burned 15 tons of fuel a second, requiring approximately 50,000 horsepower to power the fuel pumps to feed the engines. The Apollo 13 movie followed the actual flight with a fair degree of accuracy, recognizing that it had to compress four days of real-life tension into a two-hour motion picture. The film dramatized the explosion of the oxygen tank by showing the astronauts being thrown about in the cabin. In reality, the astronauts only heard a bang and then the warning alarm for low electrical bus voltage.


1990 ◽  
Vol 123 ◽  
pp. 508-508
Author(s):  
Kurt W. Weiler ◽  
Namir E. Kassim

AbstractLow frequency radio astronomy for the purpose of this discussion is defined as frequencies ≲100 MHz. Since the technology is fairly simple at these frequencies and even Jansky’s original observations were made at 20.5 MHz, there have been many years of research at these wavelengths. However, though radio astronomers have been working at low frequencies since the first days of science, the observing limitations and the move of much of the effort to ever shorter wavelengths has meant that most areas still remain to be fully exploited with modern techniques and instruments. In particular, the possibilities for pursuing the very lowest frequencies by interferometry of ground to space, in Earth orbit, or from the Moon promises a rebirth of work in this wavelength range.We present concepts for space-ground VLBI and a fully space-based array in high Earth orbit to pursue the astrophysics which can only be probed at these frequencies. An Orbiting Low Frequency Radio Astronomy Satellite (OLFRAS) and a Low Frequency Space Array (LFSA) are two concepts which will open this last, poorly explored area of astronomy at relatively low cost and well within the limits of current technology.


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