Shop Windows to the Universe

Learn about planets outside our solar system through Exoplanets and Alien Solar Systems by Tahir Yaqoob, Ph.D., a book in our online store book collection.

Flash Instructions

Some animations on this web site use Flash. To view those animations, you must have Flash installed on your computer and set up to work with your web browser.

  • Click here to go to the Flash page on Adobe's web site. You can download the version of Flash that will work on your computer from that page. Follow the directions provided by Adobe.
  • If the link above does not work for some reason, click here to go to Adobe's home page, then follow links to their Flash download page.

The animation below uses Flash. If you cannot see two planets orbiting the Sun in the animation below, you do not have Flash installed properly on your computer and will need to get it from Adobe's web site.

Last modified May 13, 2008 by Randy Russell.

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!

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Many educators are now finding opportunities to teach about Earth's climate and climate change in their classrooms.  Windows to the Universe provides an interlinked learning ecosystem to a wealth of resources...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