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  1. 'Oumuamua, possible internal composition?
  2. The fine structure constant at high energies
  3. Can we see galaxies receding at more than the speed of light?
  4. Naked eye planetary nebula?
  5. Physics problem - Geosynchronous Potato Cannon
  6. Everyones science.
  7. Can an exoplanet, by definition, orbit another exoplanet?
  8. Dwarf stars, with a certain flare.
  9. Topopolis tether
  10. Laser hulls, solar hulls
  11. Is the universe an error bubble?
  12. Can moons have moons?
  13. Does curved space have a possible alternative?
  14. Outer planets asteroid resonance
  15. Expansion of space and Redshift
  16. Wormholes and time dilation
  17. Four-page paper (excluding references) I cannot understand, pls help
  18. speed to accomplish 148k ly in 1 year ?
  19. Why aren't comets annihilated by the Sun's heat?
  20. Sky brightness and limiting magnitude on Alpha Centauri
  21. Distance to cluster center?
  22. Observing hydrogen through hydrgen?
  23. Lense-Thirring effect
  24. Medieval constellation names (Voynich Manuscript)
  25. What is "super-Earth"?
  26. Do black holes have volume
  27. If you compressed the Earth to the size of a beach ball
  28. Cosmic expansion of space
  29. Absolute expansion?
  30. Tensile strength of space
  31. Orbital Periods
  32. Earth's centrifugal non-sphericality, compared to its lunar tidal bulge
  33. How space really works
  34. temperature and speed of matter
  35. What is the nature of Electric Charge?
  36. What will happen at the end of the Universe?
  37. Question: Huge Radio Dish To detect weak broadcasts in milkyway
  38. Any good book on Peter Van de Kamp?
  39. Is it possible for humans to out live our sun?
  40. Question: Why ISS has no centrifugal gravity due to its orbital period?
  41. Neutrino pressure
  42. proton internal pressure
  43. Dark Matter
  44. Why do so many stars have a higher proper motion than Alpha Centauri?
  45. Stability of stellar rosettes
  46. How did we get here...? Where did it all begin?
  47. Sun hits denser interstellar cloud or gas filament
  48. Is this guy obviously incorrect to say the sun is liquid hydrogen?
  49. Why Are Icy Objects Pink
  50. Weak force measurement
  51. Is the 'Moon Treaty' still alive or dead?
  52. What are the tilts of the spin axises of the galaxies that make up the local group?
  53. Direction of movement of galaxies
  54. Infinite space, Time dilation & Length contraction at the Speed of light
  55. Does anyone know of a good climate simulator combined with an asteroid impact simulat
  56. Atoms
  57. Question about First-Gen Star Formation
  58. Strong gravitational lens chain
  59. Why Mars and not Mercury or Venus for example?
  60. Interplanetary Transport Network and gaseous materials
  61. Gravitational Waves, GR and Vector gravity:
  62. Dark natter is said not to intereact with itself, except gravitationally, but....
  63. Inclination of Trappist 1's planets
  64. universe a singularity
  65. Is a photon sphere really just a flat plain?
  66. wave functions and black holes.
  67. Looking for those little green men !
  68. Perhaps a REALLY dumb question about starlight?
  69. Hawking radiation: time passing in and outside the EH?
  70. In a 3-sphere universe, how does a wave function work?
  71. Combining Redshift
  72. Position in the Universe?
  73. When will the IAU approve more names for exoplanets?
  74. Do solar wind particles fall back into the solar system?
  75. How to calculate Omega_b through time ?
  76. Have they ever tried to grow snowflakes in micro-gravity?
  77. Would it be possible to jetpack back to Earth from the Moon?
  78. Sandwich box sized, ISS emergency evacuation vehicles, package..?
  79. Smash two planets together and you get.... ?
  80. Heisenberg uncertainty
  81. if matter does disintegrate into em radiation,what could be the last 'thing' to decay
  82. zero dimensional point particle
  83. The uncertainty principal: measuring things with uncertain instruments.
  84. maximum orbital
  85. The Sun
  86. Thanks to the posters on this forum for helping me write four books
  87. Bell's Theorem
  88. Why solar alignments on Feb. 22 & Oct 22?
  89. Do photon spheres form before the black hole forms?
  90. Is ZARYA coming down?
  91. could black holes have created the big bang
  92. Kilohertz gravitational wave detector?
  93. how does Hawking radiation work with SMBHs?
  94. How time works near/edge of the EH/BH?
  95. what is the maximum angle that an incoming photon's path can be changed by(BH)?
  96. does light slingshot around planets, stars etc?
  97. Why do Galaxies have a central a bulge?
  98. The 3-sphere model of the universe, and evidence that there is no curvature.
  99. could a photon be viewed as a virtual particle?
  100. entropy in a 3-sphere system.
  101. upon the heat death of the universe. Will the matter start to behave in a weird way?
  102. help integrating an equation
  103. how is space-time curvature linked with mass, in GR?
  104. red-shifting energy and momentum
  105. Some questions I have for a video I'm making on the history of science
  106. So what happens to all the space-time curvature caused by matter,across the universe?
  107. Exomoon bigger than Earth
  108. Thought experiment about stars
  109. In a 3-sphere universe, how does a wave function work?
  110. Galaxy mass
  111. Light and glass
  112. A question about measurement
  113. Does light take a path through 4-space?
  114. what is the gravitational time-dilation at the centre of a neutron star?
  115. If we could see a clock near a distant star, ie in the distant past....
  116. Lorentz contraction and mirrors
  117. "Hawking, Gell-Mann, and Feynman believed MWI was true" Really?
  118. Is life on a planet in an AGN jet possible?
  119. Confirming Kepler 1625b I
  120. The sun pumps out ten billion times as much energy as hits the earth
  121. Do the event horizon co-ordinates link frames of reference to the future?
  122. Solar system rocky/icy bodies’ atmospheres: why the way they are?
  123. is 'frame dragging' at all related to, or simlilar to tidal effects?
  124. more dense space
  125. New era of exoplanet imaging?
  126. Testing the Equivalence Principle near a black hole
  127. Couple of Questions about the Moon
  128. Present uncertainty in relative positions of Alpha and Proxima Centauri
  129. Antimatter => Negative mass => Antigravity?
  130. Are there liquid waves on Jupiter and other gas giants?
  131. Inverse square gravity law: what does it say about space time curve?
  132. Planet with a thin atmosphere and radical water cycle
  133. Did Pinatubo affect astronomical observation?
  134. dark mass vs visible mass.
  135. citation
  136. so how can an event horizon model be falsified over a non-event horizon model?
  137. Artificial Sun by the end of the year?
  138. color of Jupiter's "metallic hydrogen"?
  139. Noting the stars were blocked by the moon
  140. Lost Thread?
  141. Nature of light in QED
  142. Can dark matter be pulled out of a small galaxy by a larger galaxy?
  143. Do black holes eventually shine? And does the grid size of space change over time?
  144. The Sand Reckoner
  145. Regarding that new Event Horizon photo
  146. Need help deciphering a paper (Linde/Vanturin multiverse)
  147. Merging Black Holes and Information
  148. Why does the heliosphere have an outer edge?
  149. Galactic orbital period - is it really the same everywhere?
  150. Hottest temperature in universe
  151. Making it work for you: Bussard Ramjet and magnetic field
  152. Doctor my eyes! Spotting nukes in space
  153. maggies, nanomaggies, janskies, etc
  154. Absolute magnitude of the Milky Way: what is it?
  155. Can dark matter decay a galactic orbit
  156. Earth's Present Magnetic Field: An Evidence of the Ancient Theia Impact?
  157. Recovery period after freefall?
  158. Hittin' the old dusty (plasma) trail
  159. Wormhole shortcuts
  160. Luminosity of the Milky Way galaxy?
  161. if the electrons did not spin around the nucleus
  162. Apollo Moon Landing capsule Eva
  163. 2-body inspirals that circularize
  164. Radio waves..
  165. von klitzing constant
  166. Consensus view on what meteors were in 1840
  167. Does self-torque of light threaten QM completeness?
  168. Higgs Field Decay..
  169. Astronomy in Disney's latest cartoon
  170. Cataloging Exoplanets
  171. Falling on Venus or Titan
  172. Riess 2007 SNIa data
  173. Earth’s magnetic field east-west asymmetric between electrons and ions?
  174. Astrophotography question
  175. Why are Saturn's regular satellites so much less dense than its irregular satellites?
  176. What exactly is signal coherence (and other optical SETI questions)?
  177. Is there another way to explain how the universe works?
  178. Gravitational MicroLensing
  179. Ultra Massive Black holes & Dark Matter
  180. Why can't radio SETI searches find intermittent signals?
  181. Earth/Moon images
  182. Milky Way galaxy is warped and twisted, not flat - BBC News report
  183. Newton wrong [from an article]?
  184. Can someone please explain this optical SETI page to me like I'm a kid?
  185. Graviton & gravitino?
  186. making dark matter
  187. Why is Sirius B a white dwarf?
  188. 26 star types
  189. Black hole questions
  190. ISS orbit
  191. Moon vs Earth
  192. Vatican and Astronomy
  193. Anyone know a good mainstream definition/explainer forum or website?
  194. Distinguishing an IK Pegasi
  195. The terminology of Cosmologists - priors?
  196. How long would it take for something to fall from one light year away into the sun
  197. The flag on the Moon
  198. At what distance can we track asteroids and comets which can wipe out humanity?
  199. Glorious Earth Mass
  200. De Broglie Wave
  201. Moons of Uranus
  202. Nova mass change
  203. Dark matter mass scale?
  204. C/2019 q4
  205. Collision
  206. No Moon phases during Solomon's reign
  207. I know this isnt the first exoplanet we've found with water.
  208. The farthest star from our Galaxy core
  209. Gamma ray jets
  210. Are novae dwarf novae?
  211. value of pi
  212. Question about a very big number (# of photon interactions w/ particles)
  213. Is there a minimum mass to the universe, according to the anthropic principle?
  214. Launching from Mars
  215. Scalar waves
  216. light traveling through space
  217. How long to get the periodic table?
  218. Plasma Physics! The Solar Wind Strahl
  219. AR Scorpii
  220. Largest Defined Quantity
  221. IBEX ribbon: understanding, etc
  222. Why is Borisov still labled "C/" and not "I/"?
  223. Color of fusion rocket
  224. Plasma laser
  225. Contact binary gas giant planets
  226. Dark matter around primordial black holes
  227. Why do WIMPs annihilate each other when they collide?
  228. Electromagnetic fields as barriers
  229. Intergalactic, interstellar, interplanetary, inter- what?
  230. Planetary Info
  231. I hate to ask this again, but could someone please science-vet my video script?
  232. calculating moon size via distance
  233. Matter standing wave movement.
  234. redshift
  235. Black body theory question
  236. Sources of Milky Way luminosity by spectral class?
  237. galaxies
  238. Largest cosmological structure
  239. Video on youtube
  240. The Beginning of the Universe
  241. Something wrong with the universe article
  242. Inflation questions
  243. Hypothetical Universe
  244. Redshift general relativity and special relativity
  245. quantum fluctuations
  246. Can a microscopic black hole absorb exactly 1 quark?
  247. Question about Pound-Rebka?
  248. Fifth force?
  249. Powering Io
  250. charge radius of the proton