Did you know that the sun's energy can power a solar car all the way across the Australian Outback? Ancient Aboriginal Peoples used solar power to heat their homes. We even use solar energy to explore other planets. As our energy needs grow, scientists and other innovators are seeking new energy sources that are efficient, sustainable, and environmentally friendly. In this book, you'll examine solar energy, how we are using the sun for energy now, and how solar power might fit into our energy future.