Shop Windows to the Universe

Young Voices for the Planet DVD in our online store includes 8 films where students speak out and take action on climate change.


Satellite Mean distance from planet (miles) Maximum diameter (miles)

Phobos 5,830 17

Table of moons

Shop Windows to the Universe Science Store!

Learn about Earth and space science, and have fun while doing it! The games section of our online store includes a climate change card game and the Traveling Nitrogen game!

Windows to the Universe Community



You might also be interested in:

Science, Evolution, and Creationism

How did life evolve on Earth? The answer to this question can help us understand our past and prepare for our future. Although evolution provides credible and reliable answers, polls show that many people turn away from science, seeking other explanations with which they are more comfortable....more

Lower Atmosphere

The atmosphere of Mars is much thinner than that of Earth, with a surface pressure averaging 1/100th that at the surface of the Earth. Surface temperatures range from -113oC at the winter pole to 0oC...more

Planet Structure

The uniquely red global surface of Mars is marked by many interesting features - some like those on the Earth and others strangely different. The reddish color is caused by rust (iron oxide) in the soil....more

Martian Global Dust Storms

This image shows a local dust storm near the edge of the south polar cap. Viewing of this image at high resolution is recommended. This fascinating image shows dust swirling over a large area. Martian...more

An Overview of the Mars '98 mission

The Mars '98 mission was supposed to study the climate, weather, and surface at the Martian south pole. Mars '98 was to build upon the discoveries of the Mars Pathfinder and Mars Global Surveyor missions...more

An Overview of the Mars Global Surveyor Mission

The mission of Mars Global Surveyor (MGS for short) is to map the surface of Mars from space, a mission somewhat like to the Magellan mission to Venus. The mission is also investigating the topmost portion...more

Mars Observer

The Mars Observer set out to observe the atmosphere , magnetic field, and surface of Mars. It carried with it 8 instruments. However, the Mars Observer (called MO for short) failed on August 21, 1993,...more

The Lamb

The small, round rock shown here was named The Lamb. It was found as part of Mars Pathfinder's investigation of the surface of Mars. This rock is special because of the soils found around the rock. They...more

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA