Rotating Question Curious About Astronomy? Ask an Astronomer

Previously answered questions by Jagadheep D. Pandian

(in order of times viewed)

  1. How many stars are there in our Galaxy (Milky Way)?
  2. How do you measure the distance between Earth and the Sun?
  3. Why do planets rotate?
  4. How critical is the Earth-Sun distance in maintaining our average temperatures on Earth?
  5. How does the location of sunrise and sunset change throughout the year?
  6. What kind of rock is the moon made of?
  7. What will happen to life on Earth when the Sun becomes a red giant?
  8. What is at the end of the Universe?
  9. How do astronauts take baths and use restrooms in space?
  10. Does the Sun have a scientific name?
  11. What is a singularity?
  12. What are the "dog days of summer"?
  13. How are light and heavy elements formed?
  14. What is the mass of the Universe?
  15. Where did the Universe come from?
  16. Why doesn't the earliest sunset occur on the shortest day of the year?
  17. Why is the Universe flat and not spherical?
  18. If the Earth's rotation period is less than 24 hours, why don't our clocks fall out of sync with the Sun?
  19. Will the Sun become a black hole one day?
  20. What happens to a substance if its speed is more than the speed of light?
  21. Do black holes die? If so how?
  22. How are galaxies formed?
  23. Why isn't the summer solstice the hottest day of the year?
  24. Why do different stars appear with seasons?
  25. What are black holes made of?
  26. How do astronomers measure the brightness of stars?
  27. If light has no mass, then what draws it into a black hole?
  28. What is the size of a black hole?
  29. Why does the Earth only see one side of the Moon?
  30. What would happen if the Moon fell out of its orbit around Earth?
  31. Why do we see stars?
  32. How are black holes discovered?
  33. Why can't we see Venus at night when it is an inner planet?
  34. Why does the location of sunrise change?
  35. Which constellation does our Sun belong to?
  36. Is time travel possible using merging black holes?
  37. How long does the supernova stage of a star last?
  38. Has there been an experiment that measured speed faster than the speed of light in vacuum?
  39. Could the Universe have expanded faster than the speed of light at the Big Bang?
  40. Is it possible to see the full Moon and the Sun simultaneously in high northern latitudes when the Sun doesn't set?
  41. Are all stars the same?
  42. If a white dwarf is a "dead" star, why is it so hot?
  43. What is the significance of the second focus of elliptical orbits of planets in our Solar System?
  44. Is there a simple formula to calculate solar eclipse timings from any position on Earth?
  45. Why do constellations look the same after several years even though all the stars are moving?
  46. Will winter and summer constellations change due to abnormal warmth or cold on Earth?
  47. Why don't people walk upside-down on the bottom of the Earth?
  48. Why do the explosions of Type Ia supernovae have a more predictable spectrum than those of regular Type II supernovae?
  49. How will a change in the speed of light affect the evolution of the Universe?
  50. Will the seasons change due to precession?
  51. What is the farthest Northern Latitude in which the Magellanic Clouds can be seen?
  52. Is it true that the Sun burns off a billion tons of gas every 5 seconds?
  53. How big was the Sun when it first "fired up"?
  54. Are there any dark stars or dark galaxies made of dark matter?
  55. Why are most months 30 or 31 days long?
  56. How is it proved that the Universe is expanding?
  57. How do planets capture satellites?
  58. Why are stars of different masses?
  59. What calculations go into predicting eclipses?
  60. What will happen to the Milky Way in the future?
  61. What kind of eyepieces do I need to look at planets?
  62. Is there any possibility that the Solar System or the Universe is in a black hole?
  63. Why is the time between two successive full moons different from the lunar synodic month?
  64. Why does one side of Mars look more catastrophic than the other?
  65. Can a black hole come back to the visual universe through a "little bang"?
  66. Why is the Cosmic Microwave Background not absorbed by interstellar hydrogen?
  67. Is it possible for amateurs to do optical interferometry?
  68. What is meant by "stopping down a telescope"?
  69. Are planetary nebulae the result of supernovae?
  70. Can you give me advice on buying a telescope?
  71. Is it possible to build a cheap device to measure declination?
  72. What is a Cepheid variable?
  73. Will I be able to see the shadow of the Moon streaking towards me in a total solar eclipse?
  74. Why doesn't SETI concentrate its observations to the nearby stars and the solar systems that we are discovering?
  75. How long is twilight on the Moon?
  76. How fast do particles travel in space?
  77. How much power is contained in a beam of light?
  78. Will the next generation telescope OWL be able to detect an Earth like extrasolar planet?
  79. Will the diameter of a cluster of galaxies change with redshift?
  80. What are "curled" dimensions?
  81. Can you tell me the characteristics of W, R, N and S type stars?
  82. Wouldn't the vast distances of space distort SETI signals into unintelligeble forms?
  83. How are astronauts trained for weightlessness?
  84. Why don't all neutron stars become pulsars?
  85. What is the relationship between the width of a star trail on a photo and the star's intensity?
  86. What are the largest radio wavelengths observed from radio sources in the sky?

URL: http://curious.astro.cornell.edu/authorlist.php?number=8
This page has been accessed 507435 times since September 25, 2002.
Last modified: November 19, 2007 11:28:35 AM

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