This site provides a Java-based program called Mars24. You can download this to your computer to keep track of time on Mars.

Students explore how a satellite's motion is governed by the same physics principles and described by the same mathematical equations.

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

This site from The Galileo Project of Rice University contains information relating to Copernicus's sun-centered solar system theory. Pictures are provided throughout this article along with links to additional information.

"Learning about the Solar System" is a one page, nonfiction, reading passage about the Milky Way gallaxy and how scientists learn about it over time. It is followed by questions which require students to provide evidence from the story;...

Site recounts how X-rays were discovered as well as who discovered them. Offers graphics, links to facts on this topic, a quiz, and teacher resources.

[Free Registration/Login Required] This informational text passage shares facts about planets in the solar system. This passage is a stand-alone curricular piece that reinforces essential reading skills and strategies and establishes...

Discover how satellites that orbit the Earth can save lives. Then use images obtained by satellites to construct a three-dimensional paper model of the Earth.

From ABC News in Science, Maggie Fox's article explores a new string of "exoplanets" discovered orbiting distant stars. This research leads to numerous possibilities, one of which being the existence of planetary systems containing life...

Detailed information on Sputnik, the first artificial satellite to orbit Earth, launched by the USSR on October 4, 1957.

This is an amazing satellite image of the Nile River Delta as seen from orbit. Located in North East Africa, the Nile River is largely agreed to be the longest river in the world, reaching 6650 kilometres (4132 miles) in length. For more...

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

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!

This site from NASA has information on the Galileo space mission, which launched in October 1989. In spite of technical problems, Galileo transmitted enormous amounts of new data, especially about Jupiter and its satellites and rings,...

An image of a satellite orbiting above Earth.