Across
- 2. The rarefied gaseous envelope of the sun and other stars
- 4. A small rocky object orbiting the sun
- 8. An artificial body placed in orbit around the earth or moon or another planet in order to collect information
- 9. The natural satellite of the earth, visible at night by reflected light from the sun
- 10. A sudden occurrence of or increase in a specified phenomenon, feeling, or emotion
- 13. Of the nature of hierarchy; arranged in order of rank
- 14. A spot or patch appearing from time to time on the sun's surface
- 16. A cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouete
- 20. All existing matter and space considered as a whole
- 21. A metric unit of length equal to 1,000 meters
- 22. A celestial object consisting of a nucleus of ice and dust
- 23. The force that attracts a body toward the center of the earth, or toward any other physical body having mass.
- 25. A fixed luminous point in the night sky which is a large, remote incandescent body like the sun
Down
- 1. The distance between successive crests of a wave
- 3. The emission of energy as electromagnetic waves or as moving subatomic particles
- 5. The degree or intensity of heat present in a substance or object
- 6. The capacity or power to do work,
- 7. Chance or probability
- 11. The luminous envelope of a star which its light and heat radiate
- 12. The dense central region of a planet
- 15. A celestial boy moving in a elliptical orbit around a star
- 17. An optical instrument designed to make distant objects appear nearer
- 18. An ionized gas consisting of positive ions free and electrons in proportions resulting in more or less no overall electric charge
- 19. A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction
- 24. The rate at which a vibration occurs that constitutes a wave