"You are here: Universe - Milky Way Galaxy - Solar System - Third Planet from the Sun, Earth. Our place in the universe determines what we see in the night sky

Presents an introduction to the Solar System and the physical features of the eight planets that revolve around the Sun, in a text that includes learning activi

There is no gravity in space. The North Star never changes its position in the sky. Earth’s shadow causes the phases of the moon. You may have heard these com

Building on the eighteenth-century fascination with the possibility of life on other worlds and with traveler's tales of other cultures, this work describes lif

Does life exist on other planets? This 1998 book presents the scientific basis for thinking there may be life elsewhere in the Universe. It is the first to cove