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Across 5. is the second-largest moon of Jupiter 6. the fourth planet from the sun and has a distinct rusty red appearance. 9. is the largest of Saturn's irregular, nonspherical moons. 10. the second planet from the Sun. It is sometimes called Earth's "sister". 12. is the largest and most massive of the Solar System's moons 15. is a circle of latitude that divides a spheroid, such as Earth, into the northern and southern hemispheres. 18. the smallest planet in the Solar System and the closest to the Sun. 19. is the largest moon of Saturn 20. the sixth planet from the Sun, and the second largest planet in our Solar System after Jupiter. It is famous for its huge system of colorful rings. 22. Starts June 21st, July and August. Northern Hemisphere 24. Starts December 21st, January and February. northern Hemisphere 25. is Earth's only natural satellite 26. is a system of stars, stellar remnants, interstellar gas, dust, dark matter, bound together by gravity. 27. the largest known dwarf planet in the solar system and used to be considered the ninth planet. 28. Starts September 21st, October and November. Northern Hemisphere

Down 1. spring, summer, autumn (or fall), and winter 2. an imaginary line about which a body rotates. 3. the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth 4. the sun together with the group of celestial bodies that are held by its attraction and revolve around it 7. the star at the center of the Solar System 8. is one of the two times of the year when the positioning and tilt of Earth relative to the sun results in the most amount of daylight time. 11. all of space and time and their contents, including planets, stars, galaxies 13. the eighth planet from the Sun and the farthest known planet in the Solar System. 14. the fifth planet from the Sun and the largest in the Solar System. 15. either of the two moments in the year when the Sun is exactly above the Equator and day and night are of equal length; 16. our home planet, is a beautiful blue and white ball when seen from space. 17. is the seventh planet from the Sun 19. Earth's axis isn't straight up and down like a top; it's angled at 23.5°. 20. Starts March 21st, April and May. Northern Hemisphere 21. is the smallest of the four Galilean moons orbiting Jupiter 23. the curved trajectory of an object such as the trajectory of a planet around a star.