IGCSE Physics P6 Astrophysics

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Across
  1. 6. Non-circular orbits. Comets often follow this shape.
  2. 7. (2words) 2.2 x 10-18 s^-1
  3. 11. Contains more than 99% of the mass of the Solar System.
  4. 12. The explosion at the start of the Universe.
  5. 15. The Sun emits mostly visible light, but also lots of...
  6. 17. (2words) What the Sun will become once it runs out of hydrogen to fuse.
  7. 20. Cloud of dust (hydrogen) that may collapse into a protostar.
  8. 21. The process that stars make energy by.
  9. 22. Another name for the rocky planets of the Solar System.
  10. 23. (2words) The ultimate fate of the most massive stars.
Down
  1. 1. The disc of material that forms around a young star which planets are made from.
  2. 2. Happen through the year, due to the tilt of the Earth's axis.
  3. 3. A dwarf planet in our Solar System between the orbit of Mars and Jupiter.
  4. 4. The seventh planet from the Sun.
  5. 5. The colour of a main sequence star much more massive than the Sun.
  6. 8. (2-words) 9.5 x 10^15 m
  7. 9. (2words) What a small star becomes after the red giant stage.
  8. 10. Energy due to motion
  9. 13. The M in CMB.
  10. 14. This needs a value of about 10 million or more for fusion to occur.
  11. 16. ______ shift - the change in the frequency and wavelength of light due to the object or observer moving.
  12. 18. Light from distant galaxies all appears to be ________ed.
  13. 19. The explosion that happens to giant stars once they cannot fuse anymore. Used to measure distances.