Human Space Flight is a website where you can enter your city to see which space objects will fly by your night sky for you to see. It gives you the time of the object and how long it will take to pass over your location. Look up satellites or space shuttles!
Astronomy Picture of the Day
I did not post an example picture of Astronomy Picture of the Day because the NASA photographer does not give rights to copy his pictures without written permission, but these photographs are amazing and would lend themselves to good teaching points in the classroom.
The Exploratorium’s Observatory
The Observatory has great resources for Venus, Saturn, Mars, Mercury, sunspots and auroras. The interactive format allows you to click on different parts of the image to see more information. In addition, there are many more interactive sections of the site such as: Your Weight on Other Worlds and Your Age on Other Worlds.
Visit Mars with Google Mars
Visit Planet Science!
Welcome Google Sky!