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Across
  1. 3. of Universal all masses (like sun, moon, earth or a car)
  2. 5. fixed luminous point in the night sky which is a large, remote incandescent body like the sun.
  3. 8. observation characteristics of a phenomenon
  4. 10. the rarefied gaseous envelope of the sun and other stars.
  5. 14. body of facts or information
  6. 15. a spot or patch appearing from time to time on the sun's surface
  7. 17. light travels in one year
  8. 20. year that is distinguished by special climate conditions
  9. 21. the light from one celestial body by the passage of another
  10. 22. In celestial mechanics, an orbit is the curved trajectory of an object such as the trajectory of a planet
Down
  1. 1. solving a problem or dealing with a difficult situation.
  2. 2. planet mass to assume a nearly round shape
  3. 4. scale of temperature on which water freezes at 0° and boils at 100°
  4. 6. flare large eruptions of electromagnetic
  5. 7. superseded description of the Universe with Earth at the center
  6. 9. typically for purposes of explanation and interpretation.
  7. 10. A comet is an icy, small Solar System body that warms
  8. 11. The Moon is Earth's only natural satellite.
  9. 12. based on the meter as a unit of length; relating to the metric system.
  10. 13. a sudden, radical, or complete change
  11. 16. chemical properties, such as volume, density, or mass.
  12. 18. matter or the form of matter that holds or clings together in one body
  13. 19. the planet on which we live; the world.