Astronomy Puzzle

5. the solid body, while in space and before it reaches the atmosphere is called a ______
7. venus's carbon dioxide atmosphere creates an extermely strong ____
10. the component of its motion in the direction toward or away from us
11. physicists call this sort of repetitive action that reinforces itself a _____
13. pass infront of
14. most asteroids orbit the sun in the large gap between the orbits of Mars and Jupiter
16. if water molecules do reach the upper ponent oxygen and hydrogen atoms, a process called _____
20. are so-named because of their resemblene to earth
22. steep cliffs that run for hundereds of kilometers across mercury's surface
23. Mercury, Venus, Earth, and Mars
24. this gravitional domination of the planets by the Sun justifies our calling the Sun's family the ____
25. planets like neptune and uranus

1. some stony meteroites have no chrondrules and are called _____
2. by anaogy with the focusing ability of an ordinary lens, astronomers call such deflection of light ____
3. can also produce twists and knots as they interact gravitationally with the ring particles
4. planets like jupiter and saturn
6. are named for their resemblence to Jupiter
8. beyond neptune, extending to perhaps 50 AU from the Sun, is a region called the ___
9. astronomers call this breif but lovely phenomenon _____
12. occurs when a force that acts repeatedly on a body constantly reinforces the body's motion
15. our main clue to what bodies orbit the sun at even larger distances are the ____
17. Jupiter, Saturn, Uranus, and Neptune
18. is an object that orbits the Sun, is massive enough that its gravity compresses it into an approximately spherical shape
19. are rocky or metallic bodies, the largest of which is the dwarf planet Ceres with a diameter of about 970 kilometers.
21. which the tide becomes fatally large and showed that for a moon and planet of the same density