"## QUESTION 2: Create an array for theta in radians that will allow us to plot r and v over \n",
    "# *the entire orbit*. \n",
    "# We are using the np.linspace function, where:\n",
    "# array = np.linspace(start_value, stop_value, number of steps)\n",
    "# This will create an array of values between your start and stop value, evenly spaced with an interval between \n",
    "# values that depends on the number of steps you choose. \n",
    "# Replace these values the start and stop values you would need to plot a full orbit. \n",
    "# The number of steps to use is up to you; if your plots below are choppy you may want to go back and increase the number. \n",
    "\n",
    "theta_rad = np.linspace(0, 10, 100)\n",
    "\n",
    "# Print out the first few numbers:\n",
    "theta_rad[2:10]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 68,
   "metadata": {},
   "outputs": [
    {
     "ename": "SyntaxError",
     "evalue": "invalid syntax (<ipython-input-68-3380e3aab73a>, line 9)",
     "output_type": "error",
     "traceback": [
      "\u001b[0;36m  File \u001b[0;32m\"<ipython-input-68-3380e3aab73a>\"\u001b[0;36m, line \u001b[0;32m9\u001b[0m\n\u001b[0;31m    r =\u001b[0m\n\u001b[0m        ^\u001b[0m\n\u001b[0;31mSyntaxError\u001b[0m\u001b[0;31m:\u001b[0m invalid syntax\n"
     ]
    }
   ],
   "source": [