Long-Term Sustainability of Space Activities: Achievements and Prospects

Author(s):  
Laura Jamschon Mac Garry
Keyword(s):  
1997 ◽  
Vol 165 ◽  
pp. 367-374
Author(s):  
A. Rossi

AbstractThe space environment is presently dominated by man-made debris, for particles larger than 1 mg. A comprehensive survey of the debris population from 1 mg to the larger sizes in view of the recent data from radar and optical observations, and from the analysis of materials retrived from space is given.A brief description of the major source and sink mechanisms acting on the debris population is given, along with a very short introduction to the two models for the long term evolution developed by the group in Pisa in the last years.The results of the long term evolution analysis are presented in some detail. A likely scenario of the future space activities leads to a large growth of mmsize particles due to several catastrophic collisions. The simulation highlights the necessity of more realistic explosion models, since the current ones overestimate the 10 cm-sized fragments.An enlarged version of this paper can be found at the CNUCE Spaceflight Dynamics Group Web site: http://apollo.cnuce.cnr.it/~rossi/homerossi.html.


Author(s):  
E.A. Pavlova ◽  
V.A. Voropaev

The paper dwells upon the security and long-term sustainability of space activities and introduces the main guidelines, approved by the UN General Assembly, as well as the guidelines, which did not receive consensus approval in the UN Committee on the Peaceful Uses of Outer Space. The challenges of the long-term sustainability of space activities for achieving the goals, objectives, and means of developing world cosmonautics and maintaining the status of the Russian Federation as a world space power are reflected. The study focuses on the problems and challenges associated with the man-made debris of near-Earth space, the delimitation of air and outer space, the need to organize space traffic control, which is inextricably linked with the deployment of multi-satellite orbital constellations. The issues of counteracting the asteroid-cometary hazard are touched upon. The research findings given in the paper should help representatives of the Russian space industry understand the problems, challenges, and essence of the long-term sustainability of space activities in conjunction with issues of ensuring its security.


2020 ◽  
Vol 64 (11) ◽  
pp. 62-73
Author(s):  
L. Pankova ◽  
O. Gusarova

The article addresses the technological base development for the exploration and use of outer space over the current decade and the subsequent period. Primary attention is given to the USA, Russia and China. The most important disruptive emerging military and dual-use technologies are highlighted, their impact on strategic stability, national and international security is examined in terms of both opportunities and risks. A cluster of the most important and perspective space technologies is considered. The paper indicates the possibility and necessity of new agreements on exploration and use of outer space, crucial for adapting space activities to new military-strategic, military-political and technological realities against a backdrop of the innovative technological breakthroughs and the digitalization processes development. Under the conditions of the U.S. military-political leaders’ commitment to competition between great powers, special attentions are paid to the increase of the competition complex factor and development of the so-called PEMT-competition (political, economic, military and technological competition). One of its important focuses is the space activity. It is underlined in the perspective survey till 2040 that, in spite of the crisis situation in the Russian space sector at the boundary of the third decade of the 21st century, Russia has a real opportunity to remain in the category of leading space powers. Special case study of the article is the interactions between space development and strategic stability, on the one hand, and information warfare, on the other. The problems of the space systems vulnerability are also noted. The article emphasizes the fundamental nature, importance and necessity of an impending long-term revision of future global space activities, primarily from the perspective of strategic stability. But the necessity of intensive world discussions on space control is also stressed.


Author(s):  
Theresa Hitchens

Governance of the use of space, both at the national and the international level, is complicated. Because most countries in the world have been reticent over the last thirty years to negotiate new legally binding commitments in space, ongoing multilateral work on space governance has concentrated primarily on voluntary measures. This chapter reviews and compares the two most salient of these initiatives: the normative recommendations of the UN Group of Governmental Experts (GGE) and the Guidelines for the Long-Term Sustainability of Outer Space Activities agreed by the Committee on the Peaceful Uses of Outer Space Working Group. While the GGE was “top-down” focused on transparency and confidence-building to avoid conflict among States, the LTS Working Group was a “bottom-up” approach for safe and sustainable practices with regard to the use of space. The conclusion looks at how States can best implement the recommendations.


2021 ◽  
Vol 11 (8) ◽  
pp. 3576
Author(s):  
Christian Di Natali ◽  
Giorgia Chini ◽  
Massimo Totaro ◽  
Julio S. Lora-Millán ◽  
Eduardo Rocon ◽  
...  

The limits of space travel are continuously evolving, and this creates increasingly extreme challenges for the crew’s health that must be addressed by the scientific community. Long-term exposure to micro-gravity, during orbital flights, contributes to muscle strength degradation and increases bone density loss. In recent years, several exercise devices have been developed to counteract the negative health effects of zero-gravity on astronauts. However, the relatively large size of these devices, the need for a dedicated space and the exercise time-frame for each astronaut, does not make these devices the best choice for future long range exploration missions. This paper presents a quasi-passive exosuit to provide muscle training using a small, portable, proprioceptive device. The exosuit promotes continuous exercise, by resisting the user’s motion, during routine all-day activity. This study assesses the effectiveness of the resistive exosuit by evaluating its effects on muscular endurance during a terrestrial walking task. The experimental assessment on biceps femoris and vastus lateralis, shows a mean increase in muscular activation of about 97.8% during five repetitions of 3 min walking task at 3 km/h. The power frequency analysis shows an increase in muscular fatigue with a reduction of EMG median frequency of about 15.4% for the studied muscles.


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