Astrophysics and Cosmology

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Across
  1. 1. distance when 1au subtends 1 arcsec
  2. 5. bending of light by gravity
  3. 6. galaxy rotation evidence
  4. 8. radiation at start of universe
  5. 10. decreasing temperature over time
  6. 11. cosmic microwave background
  7. 13. same everywhere on large scale
  8. 16. unseen mass inferred from effects
  9. 17. tiny temperature variations
  10. 20. dark spectral lines
  11. 21. dense stellar remnant
  12. 22. balance of gravity and pressure
  13. 23. massive star system
  14. 24. degenerate remnant core
  15. 27. explosive stellar death
  16. 28. clears its orbit
  17. 29. derived from hubble constant
  18. 30. distance light travels in one year
  19. 31. elements in stellar atmosphere
  20. 32. force per unit mass
  21. 34. hydrogen nuclei combine
  22. 40. forming early star
  23. 41. has not cleared its orbit
  24. 42. expanded massive star
  25. 43. region with escape velocity > c
  26. 44. velocity proportional to distance
  27. 45. star pattern in sky
Down
  1. 2. universe increasing in size
  2. 3. collapsing gas cloud
  3. 4. T² proportional to r³
  4. 7. inferred from spectrum
  5. 9. long wavelength present today
  6. 12. max mass of white dwarf
  7. 14. device for observing spectra
  8. 15. wavelength change from motion
  9. 18. initial state of universe
  10. 19. same in all directions
  11. 25. apparent shift due to earth orbit
  12. 26. work done per unit mass
  13. 30. discrete wavelength lines
  14. 33. distance from earth to sun
  15. 35. expansion from singularity
  16. 36. longer wavelength from recession
  17. 37. density for flat universe
  18. 38. icy body with elliptical orbit
  19. 39. increased wavelength from recession