Winter, spring, summer, and fall—Earth experiences them all! But what about Mars? Scholars compare the planets in terms of distance, tilt, and rotation during a lesson from PBS's Space series. Great visual models of Earth and Mars, plus...

This season simulator takes Earth through an entire year cycle allowing the viewer to observe the tilt of the Earth and the intensity of the sunlight.

Impressive animated slideshow presentation on the sun's daily cycle and how the sunlight changes hour by hour over the course of a day. Includes a teacher guide with lesson plan ideas and activities.

View a map of the Earth showing the day and night regions at this moment, or from the sun, the noon, the night side, and other points of view in this simulation. Illustrated.

Did you know our sun in composed of mainly hydrogen and helium? This infograph reviews over all the chemicals that can be found in our sun.

The Arctic plays an important role in regulating Earth's climate. The region reflects much of the Sun's energy and helps keep the planet cool. Data collected by NASA have revealed that sea ice in the Arctic has steadily declined over the...

Images and diagrams of the Sun, solar phenomena such as sunspots and flares, space weather, Earth's magnetosphere and upper atmosphere, the aurora, and more.

A slideshow exploring Earth's rotation and revolution around the sun. Learn that because of Earth's axis tilt we experience the seasons!

A gallery of pictures of the cosmic beauty of the Sun, our Solar System, and exoplanets. Pictures include a caption of what the viewer is looking at.

This 2-part resource details how the Earth absorbs just enough energy from the Sun to sustain life. Content explores incoming solar radiation and outgoing terrestrial radiation.

This site from the National Aeronautics and Space Administration provides a fun project on rockets. "Nothing in space stands still. Everything either orbits around something else, or moves toward or away from something else. So how do...

Basic diagram of a solar eclipse illustrates the relative positions of the sun, moon, and earth.

These hands-on activities are are a great way for students to gain perspective on the relative sizes and distances of each planet, the relationship between the sun and Earth, and much more.

In this activity, use seasons to determine your location. Click on the different dates to view the earth's shadow at different times of the year from the sun's position.

View these amazing high-quality images of our solar system from NASA with this lithograph set. Each lithograph contains images, facts, dates, and general information on a particular subject. Background information and teaching tips are...

Fascinating collection of images from NASA, chosen for their historical or aesthetic significance. Images are searchable by subject, by NASA center, and by keyword, and each is available in three sizes. With links to more information...

Students perform many inquiry activities related to Earth's orbit. Included are recording daily temperatures, observing the sun's path over several weeks, tracking sunrise and sunset times, and angle of sunlight. Diagrams make lessons...

Students perform many inquiry activities related to Earth's orbit. Included are recording daily temperatures, observing the sun's path over several weeks, tracking sunrise and sunset times, and angle of sunlight. Diagrams make lessons...

These hands-on activities are are a great way for students to gain perspective on the relative sizes and distances of each planet, the relationship between the sun and Earth, and much more.

Want to lose weight in a hurry? Just step on a scale on almost any other planet! This page allows you to enter your weight on Earth and it will calculate your weight on all of the other planets, some moons and even some stars. Requires a...

This site from Cornell University provides a discussion of how Aristarchus arrived at his conclusions of the distance from the earth to the sun and moon. Also has his methods for determining the size of the moon and the sun.

This site from Cornell University provides a discussion of how Aristarchus arrived at his conclusions of the distance from the earth to the sun and moon. Also has his methods for determining the size of the moon and the sun.

This computer made image shows how the idea of spacetime curvature works. The gravity that results from the presence of the Earth causes spacetime to bend. This works in the same way for other objects such as Mars, Jupiter and the Sun.

A portal to resources on the sun, the Earth's neighboring planets, and the weather in space. Find out why Saturn is the "jewel of the Solar System" and explore what happens when Venus and Mercury make their rare transits across the sun.