PBS
Pbs: Find the Planets
Find out how astronomers locate new planets by observing the traits of the stars they orbit. Get some tips at locating stars with the help of star maps.
Space Telescope Science Institute
Space Telescope Science Institute: Hubble Space Telescope
Find out how astronomers are conducting extensive observations to estimate how many planets in our Milky Way galaxy might be potential abodes for life.
Other
University of Cambridge: Astro Adventure
Imagine a time when you can travel through space, planet to planet, cheaply and in comfort, when you can take a trip to the stars as your next holiday. Well, imagine no more. Learn more about the solar system as you take this trip of a...
Views of the Solar System
Views of the Solar System: The Solar System
Explore the solar system through this site that includes vivid multimedia resources. Learn the latest scientific discoveries, the history of space exploration, and much more. Site includes videos, graphics, articles, and photographs.
NASA
Nasa: Mission Science: What Is a Planet?
Find out about how planets have been classified historically, and what scientists use to study them.
PBS
Pbs Teachers: Mysteries of the Universe
Consider the issues surrounding the world of space exploration including the new fields of archaeoastronomy and astrobiology. Investigate zero gravity, the Big Bang theory, life in space and how sound travels in a vacuum.
Scholastic
Scholastic: Study Jams! Science: Our Solar System: The Universe
A video and a short multiple-choice quiz on the Universe and what it is made up of.
Scholastic
Scholastic: Study Jams! Science: Our Solar System: Outer Planets
A slideshow and a short multiple-choice quiz on the four outer planets of our solar system, which include Jupiter, Saturn, Uranus, and Neptune.
Scholastic
Scholastic: Study Jams! Science: Our Solar System: Inner Planets
A slideshow and a short multiple-choice quiz on the four inner planets of our solar system, which include Mercury, Venus, Mars, and Earth.
Other
Lunar and Planetary Institute: Explore! Mars Inside and Out
Four hands-on activities and explorations designed to engage children in learning about Mars.
National Geographic
National Geographic: Educator Resources: Extreme Weather on Other Planets
Find lesson plans, worksheets, photo galleries, and related links for teaching about the weather systems of planets in our solar system.
NASA
Nasa: Astronomy Picture of the Day: Uranus's Moon Umbriel
Brief overview of Umbriel from NASA. Answers the question "why is the moon so dark"? Provides additional links for more information. A NASA picture of the day.
NASA
Nasa: Astronomy Picture of the Day: Titania, Uranus's Largest Moon
A brief overview of Titania, Uranus's largest moon. Includes a very good description of the moon's surface. A NASA picture of the day.
E-learning for Kids
E Learning for Kids: Science: Antarctica/ What Are the Different Parts of the Universe?
In this lesson, students learn about objects in the universe, including constellations, planets, meteors, asteroids, and comets.
Smithsonian Institution
National Air and Space Museum: Exploring the Planets: Ancient Times & the Greeks
In ancient times only five planets were known: Mercury, Venus, Mars, Jupiter, and Saturn. Learn about Greek astronomer Ptolemy's theory for the solar system that was to survive for fourteen centuries.
E-learning for Kids
E Learning for Kids: Science: Seychelles: What Is the Solar System?
In this lesson, students learn about the planets, their moons, asteroids, comets, and dwarf planets in our solar system.
NASA
Nasa: Space Place: What Is a Planet?
Explore our solar system's planets- more specifically what planets are made of, and how they are formed.
NASA
Nasa: Space Place: How Long Is One Day on Other Planets?
Here on Earth a day takes 24 hours. How long are days on other planets in our solar system? Find out here in three different ways, whichever meets your learning style the best.
NASA
Nasa's the Space Place: King of the Ice Dwarfs
An information page all about Pluto! Learn about Pluto's size, path around the sun, temperature, location, and traveling partner Charon.
NASA
Nasa: The Space Place
This site is geared towards elementary learners, but most lessons can be modified for older learners. Space-related classroom activities, printable images of Earth and space, thought-provoking Space Place Musing podcasts and math-related...
CK-12 Foundation
Ck 12: Earth Science: Planet Orbits in the Solar System
[Free Registration/Login may be required to access all resource tools.] Looks at the size and shape of planet orbits.
CK-12 Foundation
Ck 12: Earth Science: Planets of the Solar System
[Free Registration/Login may be required to access all resource tools.] Examines the eight planets of our solar system and their orbits and rotation.
CK-12 Foundation
Ck 12: Earth Science: Planets of the Solar System
[Free Registration/Login may be required to access all resource tools.] Examines the eight planets of our solar system, their orbits, and rotation.
Other
Geo 154 Astronomy : Retrograde Motion
A detailed explanation of retrograde motion with three different explanations and movies to accompany them. Additional links are available for more research.