An information page all about Pluto! Learn about Pluto's size, path around the sun, temperature, location, and traveling partner Charon.

Colorful, engagingly written information about astronomy and biology for Portuguese-speaking English language learners. Both subjects are broken down into a broad array of related subtopics. The biology section is particularly helpful...

This site describes the extended belt of small bodies residing just outside the orbit of Pluto, the Kuiper Belt.

A collection of audio lectures from an introduction to astrophysics course taught at the University of California, Berkeley. The course discusses the solar system, stars, quantum mechanics, gravitation, and cosmology focusing on how...

A wealth of facts await you on this complete site. Topics include size, mass and gravity, length of day, orbit, distance from the sun, and more. A coloring page, quiz, fill-in-the-blanks activity, and interactive puzzle will challenge...

Where is our Solar System? How far away is the sun? What makes up the sun? Find out all you want to know about our solar system. This is a comprehensive on-line site about space and astronomy. Check out all of the excitement!

The Mission to Mars curricular unit introduces students to Mars-the Red Planet. Students discover why scientists are so interested in studying this mysterious planet. Many interesting facts about Mars are revealed, and the history of...

How do astronomers collect stardust? They design and build satellites that are launched into space to collect particles on specially designed panels. Satellites can be sent to orbit around an object of interest: a planet, moon, or comet....

An introduction to our solar system: the planets, our Sun and our Moon. Students begin by learning the history and engineering of space travel. They make simple rockets to acquire a basic understanding Newton's third law of motion. They...

In this interactive module students will explore what different ancient cultures believe was an explanation of the stars and planets. They will look at how the work of Nicolas Copernicus revolutionize the world of astronomy and learn how...

Looking for images of Jupiter or its moons? This is the place to start. Pictures are available from both Voyager missions, Galileo Orbiter and the Hubble Space Telescope. Choose from images of the planet, the ring, any of the Galilean...

This Java applet creates a model of a solar system with user-defined data. Users can create a solar system with up to four planets, choosing the star type at the center of the solar system, planet name, size, eccentricity of orbit and...

This thorough site presents a wealth of facts about the fifth largest planet. Topics you will find discussed include size, mass and gravity, length of day, orbit, moons, and more. Various Jupiter activities are found on this site such as...

Explore the dozens of Saturn's moons orbiting the second largest planet of our solar system. Find out about the Cassini space mission which explored Saturn's largest moon, Titan.

Discusses the information from the NASA spacecraft Messenger as it orbits Mercury and transmits photographs of the planet's surface to Earth.

Part of a larger site on the Solar System, this page offers an image of Uranus and information about its discovery, size, orbit, and atmosphere. Follow links in the left margin to read more about the planet's composition, rotation, and...

This home page from NASA offers Venus images taken by Magellan and other highlights from the mission. In orbit around Venus for four years this mission provided maps of 98 percent of the surface of Venus that are more detailed than most...

Students will use a simulation to build their own solar system discovering the relationship between gravity and motion that keeps a planet in orbit.

A diagram of the solar system.

Find out about most volcanically active world in the Solar System, Jupiter's moon named Io.

This is the home page of the team that built the Ultraviolet Imaging Spectrograph carried by the Cassini mission to Saturn.

After learning seven space-themed vocabulary words, students will go on a space adventure collecting socks. After completing five levels, students will test their new knowledge by matching five words with the pictures that show their...

[Free Registration/Login Required] An informational text about Saturn's rings. A question sheet is available to help students build skills in reading comprehension.

While astronomers and philosophers have long mused on the possibility of other solar systems, the first planets confirmed to orbit a star other than our Sun weren't found until 1992. The reason it took so long is that it's really hard!...