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Astronomy
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Across
1. The asymmetrical envelope that surrounds the earth which captures charged particles of the solar wind.
7. The process whereby the sun produces energy.
10. Type of eclipse which occurs when the earth passes between the sun and the moon.
13. Type of eclipse which occurs when the moon passes in front of the sun.
14. The expected intermediate fate of our sun in the distant future. (2 words)
16. Planet whose nearest and largest moon is Phobos.
17. The region of the solar system between the orbits of Mars and Jupiter, where most of the asteroids are found. (2 words)
20. The point on the orbit of a celestial body that is nearest to the sun.
21. Giant "iceballs" that orbit the sun in highly elliptical orbits.
22. The interval from noon on one day to noon on the next. (2 words)
23. Element whose existence was first deduced from the solar spectrum.
24. The point on the orbit of a celestial body that is farthest from the sun.
27. The fourth state of matter.
28. The part of the sun visible during a total eclipse.
29. The time it takes for earth to complete one circuit around the sun.
30. The dwarf planet traditionally thought to occupy the ninth orbit around the sun.
Down
1. A solid body, moving in space, that is smaller than an asteroid and at least as large as a speck of dust.
2. The material out of which our sun is thought to have evolved.
3. The point on the celestial sphere toward which the sun and solar system appear to be moving relative to the fixed stars. (2 words)
4. The Greek sun god who rode his chariot across the sky.
5. Of (or relating to) the brief, regularly occurring, apparently backward movement of a planetary body in its orbit as viewed against the fixed stars, caused by the differing orbital velocities of Earth and the body observed.
6. Any of the relatively cool dark spots appearing periodically in groups on the surface of the sun.
8. Time of the year when a day or night is the longest.
9. The sun's nearest planetary neighbor.
11. The collection of all matter and energy and the space where they reside.
12. Concentrations of coalesced gases and matter that orbit the sun in organized patterns.
15. A star in the constellation Canis Major, the brightest star in the sky, approximately 8.6 light-years distant from Earth.
18. A stream of high-speed, ionized particles ejected primarily from the sun's corona. (2 words)
19. The feature that is thought to be at the center of our Milky Way galaxy around which our solar system is orbiting. (2 words)
24. The point in the orbit of our moon at which it is most distant from the center of the earth.
25. A diffuse mass of interstellar dust or gas or both.
26. The largest planet of our solar system.
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