Abstract:
A regolith container for use with regolith on an extraterrestrial mass is disclosed. The filled container covers a portion of a spacecraft to provide the spacecraft with a measure of protection against space debris and radiation. The container can be compartmentalized to reduce the loss of regolith should from the container if a single compartment is penetrated.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to a regolith container for use with a structure on an extraterrestrial mass. The filled container provides a measure of protection for the structure against radiation and space debris. The structure can be a solid, semi-solid, or expandable structure. 
         [0003]    2. Description of Related Art 
         [0004]    Environments on other planets and moons in our solar system are hostile to unaided human habitation. There can be caustic chemical environments and, in some instances, temperatures can vary between more than one hundred degrees centigrade to below one hundred degrees centigrade in relatively short periods of time. Furthermore, many extraterrestrial masses have little or no atmosphere. This lack of atmosphere has serious implications on structures designed to establish a human presence on these other worlds. 
         [0005]    Little or no atmosphere means that various forms of solar radiation reach the surface of these worlds without any attenuation. Subatomic particles and electromagnetic radiation across the spectrum bombard the surface of these worlds unimpeded. This radiation can degrade and decompose the materials used to construct human habitat structures. 
         [0006]    The lack of any significant atmosphere also permits space debris to strike the surface of these worlds. The size of such debris and the potential lethality can vary greatly. With the aid of the gravity generated by these worlds, and the initial velocity of the debris in space, surface impacts can impart tremendous amounts of energy. 
         [0007]    While technology can potentially provide the answer with the use of debris and radiation shielding, this is not the optimum solution. The cost of launching debris shields into orbit and then landing the shields on an extraterrestrial mass can be staggering. 
         [0008]    One proposed solution is the use of the naturally occurring regolith of the mass to cover the habitat structure as identified in U.S. Pat. No. 5,058,330 to Chow. The regolith provides a layer of protection to absorb radiation and disperse the energy of debris impacts incident upon the structures. 
         [0009]    While the use of regolith appears to be a cost effective solution to the alternative of launching debris shields, the movement of the regolith is an issue that can undermine the use of regolith as an answer to the problem. To move the regolith may require specialized heavy equipment such as bulldozers. The weight of such equipment drives up the launch cost. Furthermore, the use of such equipment can create dust in the atmosphere that may interfere with other operations on the surface of the object. 
         [0010]    What is needed is a way to utilize regolith as a shield for extraterrestrial habitats without adversely impacting the launch cost and without interfering with other surface activities. 
       BRIEF SUMMARY OF THE INVENTION 
       [0011]    A regolith container for use with a structure on an extraterrestrial mass is claimed. The regolith container has a body having a first end and a second end, the second end disposed opposite the first end and the second end being closed. The body is hollow and substantially flexible. The first end is adapted to receive regolith from an extraterrestrial mass and the regolith substantially filling the hollow body. The first end adapted to substantially close when the body is substantially filled with regolith. When the container is filled with the regolith, the container is adapted to cover a portion of a structure disposed on the extraterrestrial mass thereby providing a measure of protection for the structure. 
     
     
       BRIEF DESCRIPTION OF THE DRAWING FIGURES 
         [0012]      FIG. 1  is a partial side veiw of the regolith container; 
           [0013]      FIG. 2  is a partial side view of the regolith container including a funnel; 
           [0014]      FIG. 3  is a side view of the regolith container being filled with regolith; 
           [0015]      FIG. 4  is a perspecitve view of a twist int eh regolith container; 
           [0016]      FIG. 5  is a perspaective view of a regolith container and a tie; 
           [0017]      FIG. 6  is a perspective view of the regolith container tied at one end; and 
           [0018]      FIG. 7  is an end view of a spacecraft covered by a regolith container; 
           [0019]      FIG. 8  is a perspective veiw of a spacecraft partially covered by regolith containers. 
       
    
    
     DETAILED DESCRIPTION 
       [0020]    Persons of ordinary skill in the art will realize that the following description is illustrative only and not in any way limiting. Other modifications and improvements will readily suggest themselves to such skilled persons having the benefit of this disclosure. In the following description, like reference numerals refer to like elements throughout. 
         [0021]    Referring now to  FIG. 1 , a side veiw of a regolith container  14  is disclosed. The container  14  has a first end  16  that is open and a second end  18  that is substantially closed. The container has a length  10  and a diamerter  12 . In the preferred embodiment, the length  10  can extend to sixty yards and the diameter of the opening  16  is approximately 14 inches. In the prefered embodiment, the container  14  is substantially cylindrical. However, alternative shapes and geometries are also possible as dictated by the specific requirements of each case. Also, the container  14  can be filled by any number of methods known within the art without modification ot the container  14 . The container  14  can be constructed from materials that are malliable to a degree and resistant to radiation and penetration by debris. It will be appreciated by those of skill in the art that such materials can be chosed based upon the specific environment of the extraterrestrial mass. Furthermore, the dimensions can be varied to accommodate a variety of situations. 
         [0022]      FIG. 2  illustrates a funnel  20  attached to the open end  16  of the regolith container  14 . the funnel has a wider mouth  22  than the opening  12  of the container  14 . Further, there are attachment points  24  on the funnel  20 . the funnel  20  directs regolith into the container  14 . 
         [0023]    Turning now to  FIG. 3 , there are cords  26  connected to the attachment points  24  of the funnel  20 . the funnel  20  and container  14  are in contact with the regolith  27  of an extraterrestrial mass  28 . As illustrated in the cutaway view  29  of the container  14 , the regolith  27  fills the container  14 . The funnel and container can be drawn over the landscape by various means. For example, on worlds where the gravity is lower than on Earth, a person in an environmental suit could draw the funnel and container. In other situations, surface transportation, such as a lunar rover, could be used that is not exclusive to the task of filling the container. The cords  26  can also be cables, chains, or other such materials. 
         [0024]      FIG. 4  illustrates how a segment  31  of the container  14  can be obtained by twising  28  the container  14  in a particluar direction of rotation  30 . This action compartmentalizes the container. In this way, should an impact penetrate a single segment  31  then the leakage of the regolith would be confined and not extend to the entire container  14 . 
         [0025]    As shown in  FIG. 5 , a segment can be created by other methods including the use of ties  32 . The tie  32  substnatially confines regolith in the segment. Again, this compartmentalizes the container. 
         [0026]    In  FIG. 6 , the container  14  is substantially filled with regolith at which point the funnel  20  is removed and the open end  16  of the container  14  is sealed off. This can be accomplished by any number of ways including, but not limited to, the use of ties, heat sealing, and knotting. 
         [0027]    Addressing  FIG. 7 , the container  14  is placed over a space structure  36  on an extraterrestrial mass  28 . In this figure, there are a number of segments  31  identified. 
         [0028]      FIG. 8  illustrates how a plurality of containers  14  are used to cover a spacecraft  36 . 
         [0029]    While embodiments and applications of this disclosure have been shown and described, it would be apparent to those skilled in the art that many more modifications and improvements than mentioned above are possible without departing from the inventive concepts herein. The disclosure, therefore, is not to be restricted except in the spirit of the appended claims.