Astronomy and Cosmology

3693 topics in this forum

1. I think I have understood what the cosmological constant problem corresponds to.

   By stephaneww, September 30, 2020
   • 1 reply
   • 658 views
   • 
   • swansont
   • September 30, 2020

2. Earth to Venus

   By Gian, September 25, 2020
   • 7 replies
   • 1.5k views
   • 
   • Endy0816
   • September 26, 2020

3. Steering to the stars

   By Gian, September 17, 2020
   • 3 replies
   • 947 views
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   • swansont
   • September 25, 2020

4. The mass of planet Earth divided by it's radius=it's gravity?

   By Hello2, September 14, 2020
   • 2 replies
   • 863 views
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   • Halc
   • September 14, 2020

5. The Sun has an atmosphere that prevents particles from the universe to reach Earth?

   By Hello2, September 11, 2020
   • 15 replies
   • 1.7k views
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   • joigus
   • September 13, 2020

6. Generational craft (split from Terraforming the Solar System) 1 2

   By Airbrush, September 2, 2020
   • 29 replies
   • 208.4k views
   • 
   • Ken Fabian
   • September 5, 2020

7. Universe has no end because

   By Daystar1, June 26, 2020
   • 20 replies
   • 2.4k views
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   • MigL
   • September 4, 2020

8. Blackholes and mass reduction

   By paulsutton, August 18, 2020
   • 12 replies
   • 1.8k views
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   • paulsutton
   • August 21, 2020

9. Lightspeed Barrier And Black Holes

   By Photon Guy, July 9, 2020
   • 9 replies
   • 1.4k views
   • 
   • swansont
   • August 20, 2020

10. Could signal encryption explain the Fermi Paradox?

    By TakenItSeriously, November 24, 2019
    • 6 replies
    • 1.3k views
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    • Airbrush
    • August 19, 2020

11. Evolution of moon

    By Sridharta, August 16, 2020
    • 1 reply
    • 751 views
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    • Strange
    • August 16, 2020

12. Some exomoons could be habitable for humans

    By alfa015, June 20, 2020
    • 22 replies
    • 2.9k views
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    • Endy0816
    • August 12, 2020

13. Was Mars an ice world?

    By Moontanman, September 13, 2019
    • 23 replies
    • 2.4k views
    • 
    • Moontanman
    • August 6, 2020

14. Nuclear Star Trek

    By Gian, June 29, 2020
    • 14 replies
    • 2.1k views
    • 
    • swansont
    • August 1, 2020

15. pinhole solar viewer

    By paulsutton, July 30, 2020
    • 4 replies
    • 877 views
    • 
    • swansont
    • July 31, 2020

16. Article : Did a supernova trigger the late Devonian extinction?

    By paulsutton, July 31, 2020
    • 0 replies
    • 654 views
    • 
    • paulsutton
    • July 31, 2020

17. Astrophysicists unveil biggest-ever 3D map of Universe...

    By Orion1, July 20, 2020
    • 4 replies
    • 1.2k views
    • 
    • MigL
    • July 23, 2020

18. Re-collapsing matter and isotopic ratios

    By joigus, July 15, 2020
    • 4 replies
    • 1.2k views
    • 
    • Mordred
    • July 17, 2020

19. New cosmocalculator

    By Mordred, July 11, 2020
    • 1 reply
    • 1k views
    • 
    • joigus
    • July 15, 2020

20. Mini Nuclear Pulse Probes

    By Airbrush, July 5, 2020
    • 19 replies
    • 1.7k views
    • 
    • Airbrush
    • July 15, 2020

21. What is this "fundamental pure number" please ?

    By stephaneww, June 27, 2020
    • 3 replies
    • 930 views
    • 
    • stephaneww
    • June 29, 2020

22. Newtonian Gravitation Simulation Help!

    By The victorious truther, June 24, 2020
    • 0 replies
    • 721 views
    • 
    • The victorious truther
    • June 24, 2020

23. Drake Equation

    By paulsutton, June 18, 2020
    • 3 replies
    • 1k views
    • 
    • Mordred
    • June 19, 2020

24. Physicists Announce Potential Dark Matter Breakthrough

    By paulsutton, June 17, 2020
    • 5 replies
    • 1.1k views
    • 
    • paulsutton
    • June 18, 2020

25. How can the initial universe (extremely dense) be hot when density and temperature are inversely proportional?

    By mo.sabith, June 13, 2020
    • 22 replies
    • 2.3k views
    • 
    • Mordred
    • June 17, 2020