as shown in fig1 the present invention is directed to a solar tracking system 10 utilizing a sheet 12 combined into a parabolic shape as a reflector . when properly aligned , energy from the sun would be reflected off of the sheet 12 and directed to a tubular member 14 serving as an energy conversion means . fluids such as water or silicones circulate through the tube 14 and are heated by the solar energy reflected off of the reflector 12 . this heated liquid flows to an energy storage means which is known in the art . the particular energy storage means and the connections between the storage means and the energy absorption tube which is utilized is not crucial and does not form a basis for the present invention . the sheet 12 must be thin , flexible and lightweight as shown by 58 ( see fig3 ). the sheet can be constructed of a polyester film ( such as mylar ) provided with a metalized solar - reflecting surface such as aluminum on at least the side of the sheet facing toward the sun . the sheet is pulled or stretched taut and formed into a parabolic arc through the use of a flexible u - shaped bracket 18 as well as a bracket 16 attached to bracket 18 . these brackets give the reflector sheet 12 its parabolic shape and insure that all of the solar energy reflected off of the sheet will be focused on a line commensurate with the energy absorption tube 14 . the reflector 12 is supported by providing stands 26 , 28 . a hole 26a is provided in each of the stands for placement of the energy absorption tube 14 . the energy absorption tube 14 is connected to the bracket 16 by a connecting member 28a and a rotating coupling member 30a . this particular configuration allows the frame and reflector to rotate while the energy absorption tube 14 is stable and does not rotate . it is important that the sunlight is perpendicularly directed onto the reflector surface . if the sunlight is not perpendicularly directed onto the reflector surface , the line of focus produced by the solar energy will not be properly focused onto the energy absorption tube 14 . fig3 is a sectional view of fig1 and it shows that when the solar energy ( designated by light rays 50 , 52 , 54 and 56 ) are perpendicularly directed onto the reflector , a line of focus directed at the energy absorption tube 14 is produced . fig4 is a sectional view of fig1 showing an improperly aligned solar collector . in this case , light waves 62 , 64 , 66 and 68 , after their reflection off of the surface 12 , are not focused upon the concentrator 14 . rather , these light rays are focused at a line , a small distance from the energy absorption 14 . as the sun moves through the sky , the light rays become more skewed , and the line of focus moves further and further from the energy absorption tube 14 . since the amount of energy collected by the solar collector is dependent upon the energy absorbed by the energy absorption tube , it is imperative that the reflector be properly positioned with respect to the sun . the present invention insures that the sun would be properly tracked by the collector by utilizing the misaligned line of focus . as shown in fig1 a longitudinal support 20 is attached to the bracket 16 on one transverse side of the reflector 12 . two photovoltaic cells 22 and 24 are affixed to the underside of the support 20 by an adhesive or glue . this support 20 extends beyond the edge of reflector 12 and the photovoltaic cells 22 and 24 receive a portion of the energy which is reflected off of the reflector 12 . one cell 22 is provided on one side of the energy absorption tube 14 and the second cell 24 is provided on the other side of the energy absorption tube 14 . although many cells could be utilized , typical of the cells which are employed are the solarex solar cells provided by edmund scientific . if the collector is properly aligned with respect to the sun , all of the sunlight is reflected onto the concentrator 14 and none onto either of the photovoltaic cells 22 , 24 . however , if the concentrator is misaligned with respect to the sun , as shown in fig4 the solar energy will not be focused on the concentrator 14 and a portion of the reflected energy will be sensed by one of the cells 22 or 24 . alternatively , photovoltaic cells 22a and 24a can be provided in lieu of cells 22 and 24 on the connecting member 28a . it is also important that the cells which are utilized are as close to the energy absorption tube as possible . the cells 22 and 24 or cells 22a and 24a are working in opposition to power a small reversible dc motor 36 in one of two directions depending upon which cell senses the reflected solar energy created by a misalignment with respect to the sun . because of the lightweight material employed as the reflector , the energy produced by either of the cells 22 or 24 or cells 22a and 24a can be solely used to power the motor 36 . this motor 36 is connected to a cylindrical tracking rod 30 which is provided under the reflector 12 and is supported by the stands 26 and 28 . a wire or filament 34 is connected to the junction between bracket 16 and u - shaped bracket 18 on one transverse side of the reflector 12 . this line is attached to this junction by an eye - hook 32 or similar device and is wrapped around the tracking rod 30 for several turns . in this manner , when one of the cells 22 or 24 or 22a or 24a senses a misalignment , the reversible motor 36 will move in a direction to correct the misalignment as shown by the arrow in fig1 . this movement rotates tracking rod 30 which , in conjunction with the wire or filament 34 , moves the energy absorption tube 24 in the proper direction . as shown in fig1 and 6 , electrical wires 38 and 40 are provided between cells 24 and 22 , respectively , on either side of the motor 36 . this circuit allows the motor to move in one direction due to the energy converted by one of the cells . if the reflector 12 is properly aligned with respect to the sun , all of the energy will be reflected onto the energy absorption tube 14 and none will be sensed by the cells 22 and 24 . since these cells are working in opposition , the motor would not operate in this case . fig5 shows a circuit diagram which could be used . in this situation , the output of each of the cells would be conducted via wires 70 and 72 , respectively , to a wire 76 which produces a differential output of the cells . the polarity of the voltage across wire 76 would dictate the direction in which motor 36 would operate . fig2 shows an embodiment 42 of the present invention in which a plurality of reflectors 12 are utilized . each of the reflectors would employ its own frame but would be tracked in conjunction with a single tracking rod 30 and single dc reversible motor 36 . however , it should be noted that each of the frames would contain its own filament or wire 44 , 46 and 48 to properly orient each individual collector . additionally , as shown , only one of the frames would have the photovoltaic cells for properly tracking the sun . further modifications of the invention herein described will occur to persons skilled in teh art and all such modifications are deemed to be within the spirit and scope of the present invention as defined by the appended claims . for example , only a single cell was shown on either side of the energy absorption tube to properly track the sun . it should be noted that depending upon the weight of the reflector or the power of the motor utilized , a plurality of cells , attached in series , can be used on either side of the energy absorption tube . additionally , if a large reflector 12 is used , an outside power source could be employed and the cells 22 and 24 or 22a and 24a would be used to power a switch connecting the outside power source to the motor 36 or directly to the tracking rod . furthermore , the present invention can be used with dish - shaped parabolic reflectors by providing four photovoltaic cells spaced at 90 ° around an energy absorption means and rotating the reflector along two axes .