Across
- 3. a minute planet; a body that could or did come together with many others under gravitation to form a planet.
- 6. a region of the solar system beyond the orbit of Neptune
- 11. ameteor that survives its passage through the earth's atmosphere such that part of it strikes the ground. More than 90 percent of meteorites are of rock
- 12. A terrestrial planet, telluric planet, or rocky planet, is a planet that is composed primarily of silicate rocks or metals.
- 13. a small body moving in the solar system that would become a meteor
- 14. a number of meteors that appear to radiate from one point in the sky at a particular date each year
- 15. the eccentricity of a conic section is a non-negative real number that uniquely characterizes its shape.
- 16. a region of space between the orbits of Mars and Jupiter where most of the asteroids in our Solar System are found orbiting the Sun.
- 17. a fundamental system in condensed matter sciences and the main constituent of gas giant planets.
Down
- 1. A gas giant is a giant planet composed mainly of hydrogen and helium.
- 2. It's big enough to be a planet
- 4. a regular oval shape, traced by a point moving in a plane so that the sum of its distances from two other points
- 5. a celestial object consisting of a nucleus of ice and dust and, when near the sun
- 7. a very steep bank or slope
- 8. a part of the territory of a Party where any goods introduced are generally regarded
- 9. Apparent retrograde motion is the apparent motion of a planet in a direction opposite to that of other bodies within its system, as observed from a particular vantage point.
- 10. a unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun.
- 11. a small body of matter from outer space that enters the earth's atmosphere