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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): Ion Charge (e):
Start Pos (-2.5-2.5 mm): Velocity (km/sec):
SWICS Instrumentation Page

ACE Instrumentation Page

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Our online store includes issues of NESTA's quarterly journal, The Earth Scientist, full of classroom activities on different topics in Earth and space science, as well as books on science education!

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SWICS Instrument Page

The SWICS (Solar Wind Ion Composition Spectrometer) instrument on Ulysses is to measure the frequency of occurence, temperature and mean speed of all the major solar wind ions, from Hydrogen through Iron....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 Educator Membership Options - Benefits and Services

Join Today! Educators can subscribe to Windows to the Universe and receive benefits and services available only to members.  We offer a range to options to fit your needs as an educator.  The table below...more

Professional Development Workshops Offered by NESTA Through Windows to the Universe

Professional Development at NSTA and other conference venues The National Earth Science Teachers Association offers dozens of teacher professional development workshops on topics in Earth and space science...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