Astronomy and Cosmology

3685 topics in this forum

1. How is space expanding ? 1 2 3 4 6

   By Spyman, March 18, 2005
   • 130 replies
   • 15k views
   • 
   • Spyman
   • April 20, 2005

2. The Measure Problem 1 2 3 4 6

   By DannyTR, September 21, 2018
   • 130 replies
   • 9.2k views
   • 
   • Phi for All
   • September 29, 2018

3. Vector theory of Gravity 1 2 3 4 6

   By coffeesippin, November 20, 2018
   • 126 replies
   • 9.9k views
   • 
   • beecee
   • January 12, 2019

4. Expansion different in different directions 1 2 3 4 6

   By Bmpbmp1975, April 8, 2020
   • 125 replies
   • 356.3k views
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   • swansont
   • April 27, 2020

5. Why can't we go faster than light? 1 2 3 4 5

   By kirbsrob, March 15, 2014
   • 123 replies
   • 13.1k views
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   • CaptainPanic
   • April 11, 2014

6. First real Black Hole image - 10 April 2019 1 2 3 4 5

   By Elendirs, April 8, 2019
   • 121 replies
   • 10.4k views
   • 
   • Strange
   • July 12, 2019

7. Middle of the universe 1 2 3 4 5

   By caharris, June 4, 2011
   • 119 replies
   • 16.1k views
   • 
   • Aethelwulf
   • June 19, 2012

8. How can a big bang expand to an infinite size? 1 2 3 4 5

   By Airbrush, November 25, 2023
   • 116 replies
   • 5.6k views
   • 
   • Markus Hanke
   • January 8

9. Drunk on Black Holes 1 2 3 4 5

   By decraig, November 20, 2013
   • 113 replies
   • 12.3k views
   • 
   • hypervalent_iodine
   • January 28, 2014

10. Univers Inside a black hole 1 2 3 4 5

    By Edgard Neuman, April 19, 2014
    • 107 replies
    • 10.4k views
    • 
    • Mordred
    • June 20, 2014

11. Picture of galaxy from when expansion only 600 million years old 1 2 3 4 5

    By Martin, October 22, 2010
    • 106 replies
    • 14.8k views
    • 
    • Martin
    • November 6, 2010

12. The Speed Of Dark? 1 2 3 4 5

    By us.2u, February 14, 2005
    • 105 replies
    • 9.6k views
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    • Sayonara
    • February 17, 2005

13. what is the universe expanding into? 1 2 3 4 5

    By cameron marical, January 24, 2009
    • 105 replies
    • 12.1k views
    • 
    • Martin
    • March 30, 2009

14. Light speed... 1 2 3 4 5

    By SockCymbal, January 29, 2004
    • 103 replies
    • 13k views
    • 
    • JohnB
    • February 12, 2007

15. Dark matter 1 2 3 4 5

    By Kevin_Hall, December 21, 2021
    • 100 replies
    • 7.1k views
    • 
    • Genady
    • January 23, 2022

16. Size a solution to Fermi Paradox? 1 2 3 4

    By coderage9100, November 16, 2018
    • 98 replies
    • 10.9k views
    • 
    • dimreepr
    • December 24, 2019

17. Who said the Universe had a beginning? 1 2 3 4

    By Gater, August 11, 2019
    • 97 replies
    • 49.6k views
    • 
    • swansont
    • September 5, 2019

18. Location of Big Bang? 1 2 3 4

    By mustang292, March 12, 2005
    • 96 replies
    • 7.7k views
    • 
    • Cadmus
    • March 17, 2005

19. How can galaxies exist with the expansion of space? 1 2 3 4

    By Lazarus, February 3, 2013
    • 95 replies
    • 9.1k views
    • 
    • Lazarus
    • March 10, 2013

20. Does Jupiter orbit the Jupiter-Sun barycenter or not? 1 2 3 4

    By Robittybob1, February 18, 2015
    • 94 replies
    • 9.8k views
    • 
    • Robittybob1
    • April 10, 2015

21. Terraforming nearby planets 1 2 3 4

    By TransformerRobot, May 23, 2012
    • 93 replies
    • 10.9k views
    • 
    • D H
    • June 24, 2012

22. Black Hole: Why do we believe that matter could be such dense? 1 2 3 4

    By MaximT, April 13, 2019
    • 93 replies
    • 8.3k views
    • 
    • Strange
    • April 23, 2019

23. Universe expansion 1 2 3 4

    By justinater22, December 3, 2012
    • 91 replies
    • 11.2k views
    • 
    • swansont
    • January 4, 2013

24. An unknown source of planetary energy? 1 2 3 4

    By Moreno, September 15, 2017
    • 91 replies
    • 9.1k views
    • 
    • jlowe22
    • March 31, 2018

25. Quantum Entanglement Solar Flare Detection and Transmission 1 2 3 4

    By Addictive Science, December 28, 2013
    • 89 replies
    • 8.5k views
    • 
    • Schneibster
    • February 22, 2014