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  1. World building for sci-fi fairytale (2 replies)
  2. On a scale of 1-10, how afraid would you be if a meteor destroyed Earth tomorrow? (3 replies)
  3. How many years are between a full moon happening on the same day of the month? (3 replies)
  4. help figuring out planet x's orbit (10 replies)
  5. What keeps everything to be constant (2 replies)
  6. Universe (2 replies)
  7. Is The coolest stars are red. (2 replies)
  8. Light Speed Broadcasts (2 replies)
  9. Solar sys. Is moving at speed of 800k km/hr then how we see stars at same position (7 replies)
  10. stuff (3 replies)
  11. What layers of the atmosphere have the ozone (1 replies)
  12. Can we see aliens with future telescopes directly? (8 replies)
  13. Position of earth (2 replies)
  14. Moon landing: Irrefutable proof? (13 replies)
  15. How the star is formed (3 replies)
  16. question about physics (1 replies)
  17. Does the moon look the same in different countries? (3 replies)
  18. Mysterious observation of moon (sun?) (5 replies)
  19. The lottery (10 replies)
  20. I need help figure out the steps to weighted average? (5 replies)
  21. If simulations of the universe (7 replies)
  22. Rotating moon (2 replies)
  23. Does the major axis (4 replies)
  24. What happens (3 replies)
  25. 2 moons (1 replies)
  26. Alien Intelligence. (13 replies)
  27. Software for astronomy and global positioning (6 replies)
  28. Isn't a light year 6 million miles? (3 replies)
  29. Why does light converge (9 replies)
  30. Could every individual galaxy in the Universe be a BIG BANG. (4 replies)
  31. Comet orbit diagram (6 replies)
  32. There is a certain strange constellation of stars. It consists of seven stars in tota (2 replies)
  33. A NASA moon landing photo (9 replies)
  34. Is earth the third planet? (1 replies)
  35. Moon questions (1 replies)
  36. How can the moon appear in the Western sky at 10am and in the Eastern sky at 10pm. (4 replies)
  37. 1st moon landing (7 replies)
  38. Moon question (2 replies)
  39. Why NASA curiosity go to the Mars other than the moon (16 replies)
  40. Gravity and planet spin question. (2 replies)
  41. Astronomy (4 replies)
  42. Space telescope (1 replies)
  43. Birds eye view of the galaxy (3 replies)
  44. 2012 moon largest in lifetime (1 replies)
  45. Composition of all nine planets (3 replies)
  46. How do u define a planet (1 replies)
  47. How the stars help in navigation (7 replies)
  48. What does the bible say about the Mayan’s prophecy 12/21/2012? (4 replies)
  49. Heidi hammel help (1 replies)
  50. How many space galaxies are there in our universe? (4 replies)
  51. Shadow on the moon (4 replies)
  52. Does Theory Of Relativity prohibit time travel? (2 replies)
  53. Moon, earth and sun (3 replies)
  54. Big Bang vs Speed of Light (6 replies)
  55. Nasa thirunallar? (2 replies)
  56. Why is the sky blue? I want to know (2 replies)
  57. Absorption? (6 replies)
  58. How is gravity manifested? (25 replies)
  59. Is GR flawed (5 replies)
  60. Neutron star? (12 replies)
  61. Sateliites, recent developments/improvements (0 replies)
  62. What's the history of naming constellations? (1 replies)
  63. Shadow calculation (1 replies)
  64. What information can a shadow give? (2 replies)
  65. What do we see when we look at black body from the left to the right ? (2 replies)
  66. How is Venus different to earth? (1 replies)
  67. Where did the Big Bang occur? (8 replies)
  68. Astronomy and planets (5 replies)
  69. Sun moves around earth (3 replies)
  70. Cause of the observed accelerating expansion of the Universe? (5 replies)
  71. I see a star that appears to move... (9 replies)
  72. Is the extent of our universe really fourteen billion years from us? (0 replies)
  73. Are absorption lines shifted in the Red-Shift phenomena? (1 replies)
  74. How can I tell the location of the planets? (2 replies)
  75. 'CMB' & supernovae (2 replies)
  76. About Space ship (3 replies)
  77. Intergalatic radio waves (1 replies)
  78. Eclipse (4 replies)
  79. How far is the milky way from the andromeda galaxy (1 replies)
  80. Big bang? (20 replies)
  81. Physics Question? (2 replies)
  82. Expansion (6 replies)
  83. Largest moon in 18 years tonight March 19th ! (13 replies)
  84. A full moon is the last of the moons four phases (5 replies)
  85. How might The Cosmonaut Alexi Leonov from 2010, the movie, work? (0 replies)
  86. Are there any galaxies which niether red shifted nor blue shifted? (9 replies)
  87. Satellites crossing thirunallar is stranded for three seconds (6 replies)
  88. Confused about astrology (3 replies)
  89. Anybody see the Geminid Meteor Shower last night? (3 replies)
  90. US funding for near Earth asteroid (2 replies)
  91. Why should the sun always rise from the east? (2 replies)
  92. Amount of curvature of space andtime depends on what? (1 replies)
  93. How many moon does jupiter have? (1 replies)
  94. Dwingeloo 2 (1 replies)
  95. If our sun was to collapse on itself how long would it take to reach earth. (11 replies)
  96. Some stars can be seen all year round due to their proximity to the celestial poles. (2 replies)
  97. What is the new planets? (5 replies)
  98. Aaerospace Engineering (5 replies)
  99. How can I get free scholarship (2 replies)
  100. How many planets are in space (11 replies)
  101. Why do ufo's have running lights? (13 replies)
  102. Big light in sky in Southeast Texas (14 replies)
  103. If we snap sun in the noon black spots are observed.what are they? (2 replies)
  104. Universe issues (2 replies)
  105. Is there any planet in the universe which have the intellectual life forms (6 replies)
  106. What if Neptune exploded (2 replies)
  107. Angle of the sun above horizon at different times in Denver (3 replies)
  108. Can any particle escape from the event horizon of the black hole? (2 replies)
  109. Can any particle escape from the event horizon of the black hole? (2 replies)
  110. 3dsun application (1 replies)
  111. Galactic Center Viewing (3 replies)
  112. Galaxies Space (8 replies)
  113. Calculation shadow (1 replies)
  114. You.f.o's? (5 replies)
  115. I wonder if I can see the Geminids from here (1 replies)
  116. Speed of expansion (2 replies)
  117. Full moon (8 replies)
  118. What is written in quran about alien or another world other than human beings. (1 replies)
  119. What shape is the universe? (10 replies)
  120. 2009 Leonid Meteor Shower (12 replies)
  121. Pleiades name (2 replies)
  122. Caracol temple (2 replies)
  123. Related to Moon Exploration (21 replies)
  124. What is distance to Andromeda galaxy? (3 replies)
  125. Half Life (5 replies)
  126. 2009 Orionid meteor shower peaks on Wednesday, (35 replies)
  127. Triangulum constellation egyptian name (6 replies)
  128. Sun in sky for 36hours (4 replies)
  129. Moon orbit (1 replies)
  130. What is the best telescope? (9 replies)
  131. How many sun spots are on sun today? (2 replies)
  132. Heads-up for Friday (2 replies)
  133. Current number of sun spots from 1-oct.-09 to 5-oct-09 (1 replies)
  134. What are the distance between glaxies and earth (6 replies)
  135. Which is beautiful. (5 replies)
  136. Space craft speed (1 replies)
  137. Does black hole really exsist ? (5 replies)
  138. The "Star' prognostication and Maitreya (2 replies)
  139. Ramadan Moon sighting in areas of Pakistan on 8/21/09. (1 replies)
  140. Why are the planets and moos round (4 replies)
  141. Looking Back In Time (24 replies)
  142. Moving star, is it something man made (3 replies)
  143. Another Planet Just Like Ours? (10 replies)
  144. If UFOs are real.how can so many astronauts remain Mum? (10 replies)
  145. Mass of double stars (1 replies)
  146. Out in space? (3 replies)
  147. Lunar and Solar Eclipse? (2 replies)
  148. Lunar and Solar Eclipse? (1 replies)
  149. Earth's velocity at apogee and perigee (4 replies)
  150. Shape of the orbits of the 8 planets and pluto around the sun (3 replies)
  151. How to calculate sidereal time of a place (1 replies)
  152. Escape velocity (2 replies)
  153. Sun light distribution (4 replies)
  154. What has been the dominant geological process on Venus for the last billion years? Wh (1 replies)
  155. The position of sun relative to center of our galaxy (1 replies)
  156. Need my Cosmology math logic checked. (6 replies)
  157. What is the maximum distance between earth and jupiter (4 replies)
  158. What is the significance of the ecliptis (1 replies)
  159. Difficulties scietists face to go outer space (3 replies)
  160. Black Holes? (4 replies)
  161. Hypothetical Planetary System query (2 replies)
  162. Making a telescope. Getting started. (2 replies)
  163. What is the fundamental structure of the universe? (2 replies)
  164. How high can the Space Shuttle go? (3 replies)
  165. Motion of earth (4 replies)
  166. How many times did we land on the moon (3 replies)
  167. Bright light in sky March 26, 2009 12:25 AM (9 replies)
  168. Rate at which the moon orbits the earth (16 replies)
  169. Example of a high mass star with an iron core? (1 replies)
  170. Spring Equinox March 17? (4 replies)
  171. 'ALDI' reflector telescope (5 replies)
  172. Comet sighting in 1999 (5 replies)
  173. Seeing the moon (1 replies)
  174. Quark matter (4 replies)
  175. Comet Search (2 replies)
  176. This might sound weird (7 replies)
  177. I seem to can't find it (6 replies)
  178. The year of the Tiger (6 replies)
  179. About saturn (8 replies)
  180. Falling Universe (20 replies)
  181. Modern time planet collision (3 replies)
  182. Going to another universe (1 replies)
  183. Planet without atmosphere (6 replies)
  184. Do you think there are other worlds like ours? (29 replies)
  185. What is a Planet? (10 replies)
  186. Light years from earth to jupiter (3 replies)
  187. Satellites in the solar system? (3 replies)
  188. Moving stars? (5 replies)
  189. An Essay on Asteroids . (4 replies)
  190. This is my theory. (10 replies)
  191. Converting mass into energy? (1 replies)
  192. Moon axis (2 replies)
  193. Shiny star over my town (2 replies)
  194. What is the name of the universe we're in? (18 replies)
  195. A Tough One (1 replies)
  196. What powers the satellites? (10 replies)
  197. Albert Einsteins failures (5 replies)
  198. Random Universe (45 replies)
  199. Delta IV and Atlas V rockets (1 replies)
  200. Moons rate of orbit (1 replies)
  201. Stars we see in the sky (8 replies)
  202. Is it possible to see satellites form night sky? (3 replies)
  203. Phases of the moon (8 replies)
  204. More Big Bang confusion (9 replies)
  205. The Big Bang (6 replies)
  206. Meteor showers or other visible events (2 replies)
  207. Planet X Nibiru (4 replies)
  208. Is it possible to recover Apollo 10 Lunar Module? (2 replies)
  209. Vacuum in space (4 replies)
  210. I am scared now. I have seen 111 for the past 4 yrs (11 replies)
  211. Visiting the moon in 1969. (5 replies)
  212. Infrared radiation? (7 replies)
  213. Angular Diameter in Arcseconds (2 replies)
  214. CERN and it's thing (6 replies)
  215. How true is the doomsday 2012 (16 replies)
  216. Is it possible that dark matter. (10 replies)
  217. Two moons On 27/08/2008 (3 replies)
  218. Sunspots and their effect on earth (3 replies)
  219. Sending Signals into Space (32 replies)
  220. Orbits and space travelling (1 replies)
  221. Flight to the moon versus Orbits & the revolving of earth and the theory of relativit (3 replies)
  222. Earth orbitting an orbitting Sun. (17 replies)
  223. How do you visualize 4D space? (1 replies)
  224. False color images taken by satellites (4 replies)
  225. Panspermia- general regard by scientific community (6 replies)
  226. Sunrise location in you.S. (2 replies)
  227. View of Moon after total lunar eclipse (2 replies)
  228. Nemesis and planet X (3 replies)
  229. Re-entry to earth's atmosphere (1 replies)
  230. December 21, 2012 (38 replies)
  231. Additional planet (9 replies)
  232. Name of the first person visited the moon (5 replies)
  233. Locate saturn in southern sky (3 replies)
  234. Universe Age (11 replies)
  235. Declination of the sun at summer solstice (2 replies)
  236. Some random Space Questions (2 replies)
  237. Why is there no sound in space? (5 replies)
  238. Is It Possible To Make Accurate Predictions From Astrology? (31 replies)
  239. Radius of Galaxy (2 replies)
  240. How is sunrise determined? (12 replies)
  241. About exploiting the earth (1 replies)
  242. Universe constant fluctuation (1 replies)
  243. More on creating black holes (26 replies)
  244. New Exo Planet (11 replies)
  245. Viewing Earth (sun) in the past through satellites? (18 replies)
  246. Commet, asteroid, and a meteor? (3 replies)
  247. Are Aliens Real (9 replies)
  248. Prices of Telescopes? (2 replies)
  249. Right ascension declination explanation (1 replies)
  250. Shadow Calculation (13 replies)