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Warnings: The True Story of How Science Tamed the Weather by Mike Smith tells the story of our storm warning system. See our online store book collection.

Spherical Analyzer

Play around with changing the numbers in the Analyzer inputs below and clicking "Run" until the particle travels all the way through without hitting either side. Click "Clear" if you want to erase the paths of past attempts.
Voltage (0-2000): Mass (amu):1 Ion Charge (e):1
Start Pos (-2.5-2.5): Velocity (km/sec):
SWICS Instrumentation Page

ACE Instrumentation Page

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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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SWICS Instrument Page

One main goal of the Ulysses mission is to test the solar wind. Scientists are really interested in the wind coming from the north and south poles of the Sun. Solar wind is made up of particles that come...more

ACE Instrumentation Page

The ACE spacecraft consists of a two-deck irregular octagon, about 1.6 meters (65 inches) across and about 1 meter (40 inches) high. Eight of the scientific instruments which measure a variety of particle...more

Images & Multimedia

Here you will find links to all sorts of pictures, animations, videos, sounds, and interactive multimedia that are on Windows to the Universe Explore collections of images in the Image Galleries. Watch...more

Setting up a Sponsorship to Windows to the Universe

Becoming a sponsor of the Windows to the Universe project is easy! Please decide what you would like to contribute to the project (all contributions are tax deductible), fill out our Sponsorship Form and...more

Donations to Windows to the Universe

Is Windows to the Universe a valuable resource for you? If so, we encourage you to help support this project through a donation, by joining Windows to the Universe as a Member, or through your purchases...more

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF