Our Solar System Crossword

2. Our solar system began as a could of gas and then this forced acted upon it to make it collapse upon itself.
5. Acronym for the union that is in charge of defining a planet.
8. The name of the first rover used in the 90's to gain data on Mars.
9. Measuring a star's position in the sky and observing how that position changes over time.
10. Known as a planet's suitability for supporting life.
16. The widely accepted theory about how the solar system was formed.
18. The shape of the orbit of a planet around the Sun.
20. Type of planet that is orbiting a star other than our sun.
21. Part of the debris left over from the formation of the solar system (aka space trash).
22. A flight of a spacecraft past a celestial body to gain scientific data.
23. A vehicle that is able to move about and collect data on a celestial body.
24. A device that lands on a celestial body to obtain data.
25. Name of the first successful flyby of Mars (excluding the number).

1. Spacecraft that orbits a celestial body to gain data.
3. The process of a star's brightness decreasing due to a planet passing in front of it.
4. The measure of how much an orbit deviates from roundness.
6. Planets that are made largely of gaseous material.
7. Planets that are further away from the sun than the asteroid belt.
11. Planets that are largely made of rock.
12. Same as a meteoroid but bigger in size.
13. Planets that are closer to the sun than the asteroid belt.
14. Solid objects moving through space made of a mixture of metal, rock and ice.
15. Pluto is considered an icy _____ planet.
17. Method of finding extrasolar stars using the Doppler Effect.
19. Another term for rotating neutron stars.