space term crossword

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Across
  1. 4. Curved path, usually elliptical in shape, an object follows around a bigger object or a common centre of mass
  2. 7. A measure of the total amount of matter within an object.
  3. 9. Galaxy going through a high rate of star formation
  4. 12. Negatively charged elementary particle found outside, but is attached to the nucleus of an atom.
  5. 13. A very bright meteor.
Down
  1. 1. Type of light with the longest wavelength with the least energy.
  2. 2. Is the science that deals with the material universe beyond the earth's atmosphere.
  3. 3. Light travels through a vacuum at 186,000 miles per second or 300,000 km per second.
  4. 5. Something visible without the aid of binoculars or a telescope.
  5. 6. The distance light travels in one year, equivalent to approximately 5.9 trillion miles (9.5 trillion KM)
  6. 8. Fundamental unit of matter consisting of fixed number of protons.
  7. 10. Is a combination of lenses made of different glass.
  8. 11. Instrument to measure total energy or power from an object in the form of radiation.