Science Crossword Puzzle

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Across
  1. 2. They are formed when matter such as a star collapses into an extremely compact state.
  2. 5. is the scientific study of objects in the universe.
  3. 7. It is the imaginary line traced by the sun in the sky.
  4. 8. Is a massive ball of plasma held together by it's own and emits light throughout the universe.
  5. 11. It is the largest and only star in the Solar System.
  6. 14. The patterns of stars seen in the sky.
  7. 16. A large cloud of gas and dust.
Down
  1. 1. It refers to an opaque body that emits thermal radiation.
  2. 3. It is the measurement of the shift of a nearby object compared to distant objects.
  3. 4. The star patterns that have been discovered but have not been officially identified as constellation.
  4. 6. it is the color of the most brightest stars in the universe.
  5. 9. these are neutron stars flickering with radio pulses.
  6. 10. it is the color of the sun.
  7. 12. these are stars which suddenly become very bright.
  8. 13. The color of the coolest stars in the universe.
  9. 15. Is an atomic process which occurs in the cores of stars.