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  1. Wdith of the Sun's habitable zone?
  2. Solar System Angle to Galaxy
  3. Nuclear Bomb in the Sun?
  4. cosmic ray panel
  5. Multiple universes like a foam and membrane universes
  6. What happens if two black holes get very close, but don't fall into each other?
  7. Density of the Sun's Surface
  8. Implementing solar system gravity simulations
  9. Music on Mars
  10. A question about Ptolemy's model
  11. How to calculate perceived gravity when rotating?
  12. Asteroid Apophis 2004MN4
  13. Expanding universe
  14. Simulations Show Liquid Water Could Exist on Mars / New Phoenix Lander results
  15. A simple but abstruse black hole question
  16. What would happen if gravity acted sideways?
  17. Twin paradox (relativity)
  18. Humph about Haumea
  19. Strange Stars
  20. Double Slit Experiment
  21. Fantastic Idea Needs Help With Mathmatical Descriptions...
  22. What is entropy?
  23. E = mc squared and black holes.
  24. Please can you confirm this
  25. What the heck is this Dark Flow that I've been reading about?
  26. Opinions for a game...
  27. Earth over weight?
  28. Lunar Exploration Question
  29. Speeds and Motion
  30. multiple star systems
  31. Mass/Energy hitting the Earth
  32. How quick can a black hole gobble earth?
  33. duration of Full Moon viewed from Earth
  34. Teaching Kids - 9 and 10 about the big bang
  35. Cygnus bubble nebula
  36. Lorentz contraction 3
  37. Cmbr
  38. What do we know about the Tyco impactor on the Moon?
  39. Night sky on exoplanet
  40. Warp drive/conventional drive question...
  41. Lost on the Moon - from Nasa?
  42. Galaxy Clusters Sliding South?
  43. 2012 Vectors
  44. distance of sound emitter
  45. Mind bender on light speed
  46. Rearding Evanescent Wave Coupling
  47. Regarding Quantum Tunneling
  48. New book-need reviewers
  49. Star colors
  50. Do all plantets in a system have a sun near them?
  51. Nibiru Question
  52. what-if question for gravity
  53. If There Was No Jupiter Would Would Happen to Asteroid Belt/Mars?
  54. Interacting Blackholes ?
  55. Viewing Distant Terrestrial Planets
  56. How fast is everything slowing down?
  57. What is the potential gravity ( gravitational potential ) at the center of the earth?
  58. CBM and background radiation questions
  59. Teaching Yourself Astronomy
  60. Is bubble fusion a realistic goal, or just plain woo-woo?
  61. acceleration and simultaneity
  62. Infinite Universe
  63. proton + electron = neutron | what about the quarks?
  64. Why Do We Have an Atmosphere?
  65. Black Hole Jets and Evaporation?
  66. Chemical And Ion Propulsion?
  67. 3 questions about close apporach of baryons
  68. g and bismuth
  69. acceleration, simultaneity, and the twin paradox
  70. dont get it
  71. Energy source in the far future
  72. My geometrical reasoning for infinite universes (and questions)
  73. Have we contaminated Mars?
  74. meteror
  75. the little goat
  76. If our atmosphere is being held by gravity, why isn't it brought down to the surface?
  77. Anti-privacy Technology
  78. What actually is going in when mass rotates or translates?
  79. Meteorite and Fireball Reporting
  80. The Moon, Engines And Lower Gravity
  81. Potential energy and gravity
  82. crackling, hissing meteor?
  83. Expanding Universe Energy Question
  84. nebular hypothesis
  85. astronomical units
  86. question about gravitons
  87. Maxwell's equations
  88. perihelion and the winter solstice?
  89. Jupiter Red Spot a cyclonic vortex?
  90. A Relative distraction
  91. LBV structure
  92. ancient astronomers measuring vernal equinox
  93. Career Problem
  94. Gravity Analogy...
  95. Space Shuttle Question
  96. Atmospheres of Galaxies and Galaxy Clusters
  97. heavenly accurance in 1935-37 HELP
  98. Shape of the Universe
  99. The expanding cosmology...
  100. Question regarding solar storms/flares
  101. Relating GR and SR
  102. Hello Again! Space Shuttle Landing!
  103. Bullet Cluster question
  104. Mr Bigelows bugs...
  105. acceptance of String Theory ?
  106. What's the fuzzy thing?
  107. What would cause the big bang to occur?
  108. What causes the Shuttle's main engines to glow on landing in this image?
  109. Unchanging Night Sky
  110. Teaspoon of Neutron Star Matter
  111. dinosaur constellations
  112. spiral arms in dark-matter galaxies
  113. Dark matter and the slowing of time
  114. relationship between Pi and Planck units
  115. Are the M51 and M101 groups receding from us?
  116. Need Help: Mathematical Astronomy Problems
  117. Phoenix
  118. happy face in sky
  119. FTL - Rambling Thoughts
  120. 2 Planets, 3 Moons, same orbit - possible?
  121. Simple BH question.
  122. Black hole vs unbreakable/unellastic rope.
  123. Rotation + Speed of Light
  124. just curious
  125. Why dont we look towards the beginning of space?
  126. Metamaterials: why not telescopes?
  127. How many supernovas have been observed
  128. Lumpiness of Universe
  129. My balls are in motion
  130. what black holes really are
  131. Jupiter
  132. Our planet earth
  133. How to see Earth at its beginning...
  134. black hole in center of every galaxy?
  135. Lunar lights
  136. Is the Mass of the Coma Cluster Entirely Baryonic?
  137. Hawking radiation
  138. Black holes and photons
  139. Question about the Twin Paradox
  140. was the big bang hot?
  141. Energy of proton?
  142. Gravity by light.
  143. I'm overwhelmed...
  144. How can mass be compressed into such small volumes?
  145. Regarding Frames of Reference & Mass/Energy equivalency
  146. REAL star looks
  147. Question for the Mathematicians (amateur and pro)
  148. At what distance from us (centre of Milky Way) is MES > gravity?
  149. big bang and temperature
  150. VENUS planet of Heat.
  151. The stars we see
  152. Lunar Maria
  153. Simple Question: Distances & Discoveries
  154. Star Nurseries
  155. brightness question
  156. black hole
  157. Can O/B Stars Have Planets?
  158. Could I Have Seen The Same One?
  159. Relativity & Light Question
  160. black holes
  161. Brightness on different Celestial Objects and assorted Madness
  162. rolled up dimensions how do they work?
  163. light escaping from a black hole question.
  164. Gamma Ray Bursts and Supernova
  165. Odd things floating on google sky
  166. Spectrochemical Analysis to search for extrasolar life
  167. Why can't terrestrial planets be larger?
  168. 2. Is this really a paradox “irresistible force meets an immovable object"
  169. Nubie unification question
  170. Light!
  171. Speed of light in a multidimensional universe?
  172. mercury/venus
  173. Lunar orbit
  174. Panspermia to Jupiter
  175. Astronomy calendar
  176. atomic clocks and spacetime
  177. Time in Episode Relativity, Relativity and more Relativity.
  178. Wavey Nature of Everything?
  179. Age & distance of the edge of the visible universe
  180. Accelerating expansion.
  181. Where have the sunspots gone?
  182. CMB is different in the distant universe - evidence?
  183. What is nothing?
  184. Most common particle in the Universe?
  185. Copper Spectral lines info
  186. Could someone please tell me what it is I am seeing here?
  187. Lost of Information
  188. uhh.. is Special Relativity as simple as...
  189. cyanogen
  190. Help with the physics of fringe claim
  191. Slow Light?
  192. Noob's relativity question
  193. Viking lander thingy
  194. Hot Jupiters and Earth-Sized Exoplanets
  195. Lines of stars in M13
  196. Crescent Jupiter
  197. redshift
  198. Question about Viking 1,2 experiments
  199. gravitational field, force at a distance
  200. REAL zero gravity combat
  201. Astronomical event, June 4, 1988?
  202. Rotation of our planet
  203. Rogue Planets
  204. gravity at the earths core.
  205. The Path of Math
  206. CMBR: not affiliated with the Big Bang?
  207. Planet above Phoenix sky
  208. Is plasma physics taught at your university?
  209. Question of Quantum Teleportation in Space?
  210. What is the gravitational redshift at the surface of a common neutron star?
  211. Dark matter and energy, is it a reality?
  212. our "place" in the "universe"?
  213. Question about the Clouds...
  214. Oxidation
  215. Extremely long mechanical link between moving clocks
  216. space propulsion
  217. matter, once again...
  218. hey 2 questions
  219. what is the difference between a rolled up dimension and a black hole?
  220. Does a light shone from a hovering object outside of a black hole redshift?
  221. Can a black hole be produced from ...
  222. Supergiants
  223. perturbation theory, precession
  224. topology of universe
  225. what is the max speed of a spaceship travelling near a black hole?
  226. Carbon and Plutonium
  227. perception of sky colour reversal
  228. Stellar sized Bose-Einstein Condensate...
  229. Hawking Radiation Question
  230. A van full of budgies
  231. Question about upcoming year in science?
  232. ISS games
  233. Car on a Trailer/Plane in a boxcar
  234. Varying Speed of Light - What Do You Think?
  235. A Beginner Physics Book
  236. Are black holes cold?
  237. Venus' Orbit
  238. Random Jibberish About Bad Physics
  239. Roots/Exponents equation help
  240. Special Relativity Textbooks
  241. Question about Titan
  242. Rate change?
  243. How long can the Voyager 1 (and the other interstellar-space bound probes) last?
  244. Bose - Einstein condensate
  245. After reading the "Star of Bethlehem" threads here
  246. Are we the only planet relying on the sun?
  247. mars' past habitability
  248. Do Singularities have a tail?
  249. Hot cores...planets.
  250. With out gravity, would there be no space?