[Free Registration/Login may be required to access all resource tools.] Reveals tidal patterns and that tides are caused by the gravitational attraction of the Sun and Moon to Earth.

This section is dedicated to educators to become expert instructors on topics like: distance between Earth, the Sun, and the moon, the phases of the moon, and reason for the seasons. Site includes information about how to address...

Learn about the rotation of the earth, the movement of the moon, and the position of the sun.

Did you know the rising and falling of the sea level is caused by the gravity of the Moon and the Sun? Kids learn about ocean tides including tidal currents and types of tides on this site.

During this lesson students are going to take a look at moon phases and sunrise-sunset times in order to learn about daylight hours. Students discover that we do not always have the same amount of daylight each day. This lesson is best...

Find out what the diameter and volume of the Earth and the Sun are and learn just how much bigger the Sun is. Also explains how the Sun compares to the Moon.

This site explains what tides are and the difference between Proxigean Spring Tides, spring tides, and neap tides, and how these are formed. Graphic illustrations are provided.

Why does the Moon not always look the same to us? Sometimes it is a big, bright, circle, but, other times, it is only a tiny sliver, if we can see it at all. The different shapes and sizes of the slivers of the Moon are referred to as...

What objects are in the day sky and the night sky? How do they seem to move? Come and explore with us as we discover the sun, moon, planets and stars! This detailed lesson plan includes pictures and videos of the lesson in action,...

Enter our solar system to interact with the planets, moons, asteroids, meteors, and more. Investigate with NASA scientists and explore missions related to space exploration. Read facts, compare statistics, look through resources, and...

In this lesson, students will observe and communicate how the stars are in the sky both day and night. The extremely detailed lesson includes photos and videos of the lesson in actions, examples of student's work, materials, parent...

A detailed overview of the history, mythology, and current scientific knowledge of each of the planets and moons in the solar system.

This site from the Astronomy Department of Cornell University provides brief introduction to both solar and lunar eclipses. Links are provided for pictures and charts of the eclipses, and this is a good site to check out on the subject.