Geo Visitors Map

  Beauty & mystery in science.

Gases near a dying star in the Helix Nebula. This nebula is located in the Aquarius constellation. Each knot of gas is several billion miles across. Credit: C. Robert O'Dell and Kerry P. Handron

  Science tidbit

Plasma ball.
Plasma Ball Physics

A plasma ball is fun, but plasmas are an important part of our physical universe. From lightning to stars to the Northern Lights, plasmas are all around us.

Read about the basics of plasmas.

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Where multiple shippers are available, the customer chooses the delivery service. Approximate shipping costs are shown prior to the completion of payment.