Astronomy

1. former planet
2. the gaseous atmosphere surrounding the head of a comet.
6. a small rocky object orbiting the sun
7. onsisting of a tiny, icy core and a tail of gas and dust.
10. the solid remains of a meteor that falls to Earth.
13. the velocity of a body along the line of sight.
16. the conversion of ultraviolet light into visible light.
17. the outflow of low-density, hot gas from the Sun’s upper atmosphere.
18. the point in the sky from which meteors in showers appear to come.
21. a cloud of gas and dust in between the stars.
22. a category of exoplanet with a radius about 1.25 to 2 times Earth’s radius.
23. a region between the orbits of Mars and Jupiter
24. Gaseous planets

1. one of the numerous small, solid bodies that, when accreted together, form a planet.
3. a meteorite lacking chondrules
4. a meteorite containing small spherical grains called chondrules.
5. a planet not orbiting our Sun.
8. the Sun, planets, their moons, and other bodies that orbit the Sun.
9. small, solid bodies moving within the Solar System.
11. the passage of a celestial body across the face of a larger body.
12. the addition of matter to a body
14. a stream of ionized particles evaporated from a comet
15. rocky planets
17. center of our solar sytem
19. the plume of gas and dust from a comet.
20. a comet tail containing dust that reflects sunlight