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Hands On Mineral Identification helps you to identify over 14,500 minerals! By M. Darby Dyar, Ph.D. See our DVD collection.
This is a drawing of the Earth's magnetosphere. The plasma sheet is highlighted in yellow.
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The Plasma Sheet

The plasma sheet is just that, a sheet of plasma. It is much thicker than a sheet of paper though! In fact, it is much thicker than the distance through the middle of the Earth!

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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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Cool It! Game

Check out our online store - minerals, fossils, books, activities, jewelry, and household items!...more

The Plasma State

Plasma is known as the fourth state of matter. The other three states are solid, liquid and gas.Almost everything is made up of atoms (your dog, your science book, this computer...). The atom has a nucleus...more

The Lobes

The lobes of the magnetosphere are a huge area between the magnetopause and the plasma sheet....more

An Overview of the Parts of Jupiter's Magnetosphere

Jupiter's magnetosphere is very pointed and bullet-shaped, as shown in this picture, because of the nature of how it is created. The magnetosphere has many parts, such as the bow shock, magnetospheath,...more

Magnetosphere

A magnetosphere has many parts, such as the bow shock, magnetosheath, magnetotail, plasmasheet, lobes, plasmasphere, radiation belts and many electric currents. Particles in the magnetosphere cause aurora...more

AU

AU stands for Astronomical Units. It is an easy way to measure large distances in space. It is the distance between the Earth and the Sun, which is about 93 million miles. For really big distances, we...more

The Spiral of the IMF

The solar wind is formed as the Sun's top layer blows off into space. It carries magnetic fields still attached to the Sun. Streams appear to flow into space as if they are spiraling out from the Sun,...more

Spiral Path of Material

For a planet to be affected by a blob of material being ejected by the sun, the planet must be in the path of the blob, as shown in this picture. The Earth and its magnetosphere are shown in the bottom...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