Hi
I am making a simulation of the inner planets of the solar system using the three-step Beeman scheme. I am confused about how to display the planets. for my starting inputs I have the data from NASA JPL website, so for the Earth I have the following:
Code:
 Planet Name	 positionX		     positionY		    velocityX(km/s)	    velocityY(km/s)      radius	 acceleration	 mass(kg)
Earth		-1.685246520883574E-01  9.687833042792607E-01	-1.723394582127405E-02	-3.007660313409631E-03	   50	     0		 5.9736e+24
These values are huge so how do I convert these to the cartesian coordinates that JAVA uses?

Thanks