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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. Can moons have moons?
  12. Does curved space have a possible alternative?
  13. Outer planets asteroid resonance
  14. Expansion of space and Redshift
  15. Wormholes and time dilation
  16. Four-page paper (excluding references) I cannot understand, pls help
  17. speed to accomplish 148k ly in 1 year ?
  18. Why aren't comets annihilated by the Sun's heat?
  19. Sky brightness and limiting magnitude on Alpha Centauri
  20. Distance to cluster center?
  21. Observing hydrogen through hydrgen?
  22. Lense-Thirring effect
  23. Medieval constellation names (Voynich Manuscript)
  24. What is "super-Earth"?
  25. Do black holes have volume
  26. If you compressed the Earth to the size of a beach ball
  27. Cosmic expansion of space
  28. Absolute expansion?
  29. Tensile strength of space
  30. Orbital Periods
  31. Earth's centrifugal non-sphericality, compared to its lunar tidal bulge
  32. How space really works
  33. temperature and speed of matter
  34. What is the nature of Electric Charge?
  35. What will happen at the end of the Universe?
  36. Question: Huge Radio Dish To detect weak broadcasts in milkyway
  37. Any good book on Peter Van de Kamp?
  38. Is it possible for humans to out live our sun?
  39. Question: Why ISS has no centrifugal gravity due to its orbital period?
  40. Neutrino pressure
  41. proton internal pressure
  42. Dark Matter
  43. Why do so many stars have a higher proper motion than Alpha Centauri?
  44. Stability of stellar rosettes
  45. How did we get here...? Where did it all begin?
  46. Sun hits denser interstellar cloud or gas filament
  47. Is this guy obviously incorrect to say the sun is liquid hydrogen?
  48. Why Are Icy Objects Pink
  49. Weak force measurement
  50. Is the 'Moon Treaty' still alive or dead?
  51. What are the tilts of the spin axises of the galaxies that make up the local group?
  52. Direction of movement of galaxies
  53. Infinite space, Time dilation & Length contraction at the Speed of light
  54. Does anyone know of a good climate simulator combined with an asteroid impact simulat
  55. Atoms
  56. Question about First-Gen Star Formation
  57. Strong gravitational lens chain
  58. Why Mars and not Mercury or Venus for example?
  59. Interplanetary Transport Network and gaseous materials
  60. Gravitational Waves, GR and Vector gravity:
  61. Dark natter is said not to intereact with itself, except gravitationally, but....
  62. Inclination of Trappist 1's planets
  63. universe a singularity
  64. Is a photon sphere really just a flat plain?
  65. wave functions and black holes.
  66. Looking for those little green men !
  67. Perhaps a REALLY dumb question about starlight?
  68. Hawking radiation: time passing in and outside the EH?
  69. In a 3-sphere universe, how does a wave function work?
  70. Combining Redshift
  71. Position in the Universe?
  72. When will the IAU approve more names for exoplanets?
  73. Do solar wind particles fall back into the solar system?
  74. How to calculate Omega_b through time ?
  75. Have they ever tried to grow snowflakes in micro-gravity?
  76. Would it be possible to jetpack back to Earth from the Moon?
  77. Sandwich box sized, ISS emergency evacuation vehicles, package..?
  78. Smash two planets together and you get.... ?
  79. Heisenberg uncertainty
  80. if matter does disintegrate into em radiation,what could be the last 'thing' to decay
  81. zero dimensional point particle
  82. The uncertainty principal: measuring things with uncertain instruments.
  83. maximum orbital
  84. The Sun
  85. Thanks to the posters on this forum for helping me write four books
  86. Bell's Theorem
  87. Why solar alignments on Feb. 22 & Oct 22?
  88. Do photon spheres form before the black hole forms?
  89. Is ZARYA coming down?
  90. could black holes have created the big bang
  91. Kilohertz gravitational wave detector?
  92. how does Hawking radiation work with SMBHs?
  93. How time works near/edge of the EH/BH?
  94. what is the maximum angle that an incoming photon's path can be changed by(BH)?
  95. does light slingshot around planets, stars etc?
  96. Why do Galaxies have a central a bulge?
  97. The 3-sphere model of the universe, and evidence that there is no curvature.
  98. could a photon be viewed as a virtual particle?
  99. entropy in a 3-sphere system.
  100. upon the heat death of the universe. Will the matter start to behave in a weird way?
  101. help integrating an equation
  102. how is space-time curvature linked with mass, in GR?
  103. red-shifting energy and momentum
  104. Some questions I have for a video I'm making on the history of science
  105. So what happens to all the space-time curvature caused by matter,across the universe?
  106. Exomoon bigger than Earth
  107. Thought experiment about stars
  108. In a 3-sphere universe, how does a wave function work?
  109. Galaxy mass
  110. Light and glass
  111. A question about measurement
  112. Does light take a path through 4-space?
  113. what is the gravitational time-dilation at the centre of a neutron star?
  114. If we could see a clock near a distant star, ie in the distant past....
  115. Lorentz contraction and mirrors
  116. "Hawking, Gell-Mann, and Feynman believed MWI was true" Really?
  117. Is life on a planet in an AGN jet possible?
  118. Confirming Kepler 1625b I
  119. The sun pumps out ten billion times as much energy as hits the earth
  120. Do the event horizon co-ordinates link frames of reference to the future?
  121. Solar system rocky/icy bodies’ atmospheres: why the way they are?
  122. is 'frame dragging' at all related to, or simlilar to tidal effects?
  123. more dense space
  124. New era of exoplanet imaging?
  125. Testing the Equivalence Principle near a black hole
  126. Couple of Questions about the Moon
  127. Present uncertainty in relative positions of Alpha and Proxima Centauri
  128. Antimatter => Negative mass => Antigravity?
  129. Are there liquid waves on Jupiter and other gas giants?
  130. Inverse square gravity law: what does it say about space time curve?
  131. Planet with a thin atmosphere and radical water cycle
  132. Did Pinatubo affect astronomical observation?
  133. dark mass vs visible mass.
  134. citation
  135. so how can an event horizon model be falsified over a non-event horizon model?
  136. Artificial Sun by the end of the year?
  137. color of Jupiter's "metallic hydrogen"?
  138. Noting the stars were blocked by the moon
  139. Lost Thread?