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

Giovanni Cassini was Italian-French astronomer who lived between 1625-1712. He discovered that Saturn's Rings are split into two parts, and today the gap between them is called the "Cassini Division". He also discovered four more moons of Saturn, in addition to those found by Huygens twenty years earlier.

Cassini studied hydrology at the Pope's request, and how to avoid the damaging floods that plaqued Europe. Unfortunately, his greatest mistakes were rejecting the Copernican model of the solar system and Newton's theory of universal gravitation.

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Our online store includes fun classroom activities for you and your students. Issues of NESTA's quarterly journal, The Earth Scientist are also full of classroom activities on different topics in Earth and space science!

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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

Christian Huygens

Christian Huygens was a Dutch physicist and astronomer who lived between 1629-1695. He found new methods for grinding and polishing lenses, making telescopes more powerful. Using a telescope he had made,...more

Nicholas Copernicus

Nicholas Copernicus was a Polish astronomer who lived between 1473-1543. He was born in Torun, Poland to a middle class family. He attended school at Cracow and eventually moved on to Italy where he received...more

Isaac Newton

Isaac Newton was an English scientist and mathematician who lived between 1642-1727. He had one of the most brilliant minds the world has ever known. Legend has it that seeing an apple fall gave Newton...more

Mars Polar Regions

The North and South Poles on Mars are similar to the polar regions on Earth in many ways. They are the coldest places on the planet, with wintertime temperatures dipping to a frigid -150 C (about -238...more

Charles Darwin

Charles Darwin was an English Naturalist who lived between 1809-1882. In 1859, with the publication of The Origin of Species by Means of Natural Selection, he challenged existing views on the appearance...more

Christian Doppler

Christian Doppler was an Austrian mathematician who lived between 1803-1853. He is known for the principle he first proposed in Concerning the coloured light of double stars in 1842. This principle is...more

Ben Franklin

Ben Franklin was an American scientist and statesman who lived between 1706-1790. At a time when little was known about electricity, he carried out many experiments to learn of its dangers and possible...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