Rotating Question Curious About Astronomy? Ask an Astronomer

Previously answered questions by Dave Kornreich

(in order of times viewed)

  1. How long does it take for the Sun's light to reach us?
  2. Which planets have rings?
  3. Why do stars twinkle?
  4. Can you hear sounds in space?
  5. What is the life cycle of a star?
  6. What is that ring (or rainbow) around the moon?
  7. How do we know the age of the Universe and the Earth?
  8. Can artificial gravity be created in space?
  9. When was the last time all 9 planets were aligned?
  10. What direction do planets rotate?
  11. What is a nova?
  12. Why do all the planets orbit in the same plane?
  13. Who first measured the speed of light?
  14. What are RA and DEC?
  15. What are the requirements for being a planet?
  16. Why can't you see stars during the day?
  17. What would happen if you took off your helmet in space?
  18. How do we know the mass of the Earth and the Moon?
  19. Why do stars change colour when they twinkle?
  20. How are elements heavier than iron formed?
  21. Why do we not have eclipses every month?
  22. What causes seasons?
  23. How did asteroids form and what is the difference between an asteroid and a comet?
  24. How do you measure the mass of a star?
  25. What are Altitude and Azimuth?
  26. Why do planets not twinkle?
  27. How does light pollution affect astronomers?
  28. What is the shape of the universe?
  29. Where are stars born?
  30. Can you see satellites?
  31. Which hemisphere has the best view of the Milky Way?
  32. Why does the Moon look big on the horizon?
  33. Why is twilight short near the equator?
  34. Where did all the water in the universe come from?
  35. Do dead stars still shine?
  36. How do gravitons escape black holes to tell the universe about their gravity?
  37. Will we get sucked into the black hole at the center of the Milky Way?
  38. Can we find the place where the Big Bang happened?
  39. What is time dilation?
  40. How can two moons of Saturn share the same orbit?
  41. What is a dimension?
  42. How big is the universe?
  43. Do you think it's possible to maintain life on other planets?
  44. How do I tell which planet is which?
  45. If the universe is 15 billion years old, how can it be larger than 15 billion light years across?
  46. Do the Sun's or Earth's magnetic field reverse?
  47. How are photons created and destroyed?
  48. Why are there blue shifted galaxies?
  49. Why is our solar system so different from all the others we've found?
  50. Why are there no craters on Earth? Did all the meteorites miss us?
  51. Why doesn't gravity change the speed of light?
  52. How do we measure distances to other stars?
  53. Are time machines possible?
  54. What happens when you change the mass of a White Dwarf or Neutron Star?
  55. Do astronomers believe in astrology?
  56. How do we know if the universe will keep expanding forever?
  57. Why do most moons orbit their planets at the equator?
  58. Do you believe in UFOs?
  59. How can geometry be different in space?
  60. Can life exist on the recently discovered extrasolar planets?
  61. How can we measure distances to more stars?
  62. Can one star orbit another?
  63. What is sidereal time?
  64. When unmanned spacecraft accelerate in space, what causes them to slow down?
  65. What is a Dyson Sphere?
  66. Have gravitational waves been proven to exist?
  67. What equipment do I need for astrophotography?
  68. What caused Shoemaker-Levy 9 to split up?
  69. Could we be seeing dead stars?
  70. Can you tell time by the Big Dipper?
  71. How powerful are quasars?
  72. Why is it important to study meteorites?
  73. How can I contribute to science as an amateur astronomer?
  74. Are the asteroids the remains of a planet which broke apart?
  75. How could galaxies have gotten so far away in only 15 billion years?
  76. What kind of telescope should I use for astrophotography?
  77. Can the theory of formation of the solar system explain all the observables?
  78. What makes a satellite geosyncronise itself with Earth's orbit?
  79. What's new with the Big Bang?
  80. If comets are boiling away, why are there any left?
  81. Why search for only Earth-like life on other planets?
  82. What are the boundaries of the constellations?
  83. What kinds of star clusters are there?
  84. Can HST see the Oort cloud?
  85. Do electrons age?
  86. Does the shuttle worry about space junk?
  87. How do distant galaxies differ from those nearby?
  88. What do stellar classifications mean?
  89. Is cosmic expansion happening on microscopic scales?
  90. How can you tell the difference between single and multiple extrasolar planets?
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URL: http://curious.astro.cornell.edu/authorlist.php?number=1
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Last modified: November 19, 2007 11:28:35 AM

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