1. A structure that has two poles.
3. A NASA mission to the asteroids Mathilde and Eros.
7. The abbreviation for 22 across.
9. The abbreviation for electromagnetic radiation with wavelengths 
   that are just a little shorter than visual light.
10. A bundle of light energy thought of as a particle but not having 
    real mass.
11. The sixth planet from the Sun noted for its beautiful rings.
12. The amount of energy needed to move an electron through a one volt
    electrical potential. (2 words)
17. A region around a magnetic planet formed by the motion of the solar 
    wind ramming into that magnetic field (also called magnetosphere).
19. Space where there is very little or no matter.
22. Bundles or clouds of electrically charged gas ejected from near the 
    Sun's surface. (3 words)
24. The negatively charged particle in the portion of an atom outside
    the nucleus.
25. A spacecraft launched on September 25, 1997 to measure the composition 
    of the solar wind.
26. The measure of the amount of mass per unit of volume of matter.
28. Magnetic ______ - A series of disturbances on a planet causing 
    auroras (in Earth's case) at lower latitudes.
29. Also referred to as the Giant Planets - Jupiter, Saturn, Uranus, and
    Neptune. (2 words)
31. A spot where the pull of the Sun's gravity is equal to the pull of 
    the Earth's gravity. (2 words)
32. The regions in the magnetosphere of a planet where the magnetic field 
    lines of force have a geometrical shape like a funnel.
33. The abbreviation for the speed of light.

1. This is formed when the solar wind rams into the magnetosphere.
2. The visual surface of the Sun.
3. The very high density central part of an atom consisting of protons 
   and neutrons.
4. The abbreviation for 12 across.
5. The natural satellites orbiting around planets.
6. A spacecraft built by the European Space Community and launched in 
   December 1995.
8. The fourth planet from our Sun.
13. The abbreviation for a coordinate system useful for scientists who 
    study the Earth's magnetosphere and which depends on the direction 
    of the Earth's magnetic dipole.
14. A fragile body of ice and dust in orbit around the Sun.
15. Anything with the Earth as its center point.
16. The nearest star to our planet.
18. An electrically charged gas that usually blows almost directly 
    outward from the Sun. (2 words)
20. The height above a planet's surface.
21. The process in which oppositely directed lines of force merge 
    together and tend to cancel each other out.
22. A material that allows electrical current to pass easily through it.
23. A vehicle that is launched into space to observe something in 
    nature (or made by man) for scientific or technical purposes.
27. Very hot gas balls composed mostly of the element hydrogen.
30. An atom or molecule that has lost or gained one or more electrons 
    and is therefore electrically charged.