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