|Last: 1. Space, Time, Matter, & Energy||Next: 3. Ancient Astronomy|
Just as Hawaii is a body of land surrounded on all sides by water, so the Earth is an object surrounded on all sides by space. It's convenient to pretend that the Earth is inside an enormous sphere, and plot the locations of stars and planets on this sphere. The daily rotation of this sphere and the annual progression of the Sun along the zodiac are both due to motions of the Earth.
A view of the Earth and Moon together in space.
An interactive planetarium. You can view the sky from any location at any time, zoom in on selected areas, and more. Created by John Walker.
Shows how the sky over Hawaii changes during one day, from midnight on 8/30/99 to midnight on 8/31/99.
Shows how the sky over Hawaii changes over one year, from noon on 8/30/99 to noon on 8/31/00.
Shows how the sky changes as you travel from the south pole to the north pole.
Homework 2: Observing Mars, due 9/08. See also:
Quiz 2: What Do You See?