Astronomy and Cosmology

3705 topics in this forum

1. Was Mars an ice world?

   By Moontanman, September 13, 2019
   • 23 replies
   • 2.6k views
   • 
   • Moontanman
   • August 6, 2020

2. Nuclear Star Trek

   By Gian, June 29, 2020
   • 14 replies
   • 2.2k views
   • 
   • swansont
   • August 1, 2020

3. pinhole solar viewer

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

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

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

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

   By Orion1, July 20, 2020
   • 4 replies
   • 1.3k views
   • 
   • MigL
   • July 23, 2020

6. Re-collapsing matter and isotopic ratios

   By joigus, July 15, 2020
   • 4 replies
   • 1.3k views
   • 
   • Mordred
   • July 17, 2020

7. New cosmocalculator

   By Mordred, July 11, 2020
   • 1 reply
   • 1.1k views
   • 
   • joigus
   • July 15, 2020

8. Mini Nuclear Pulse Probes

   By Airbrush, July 5, 2020
   • 19 replies
   • 1.8k views
   • 
   • Airbrush
   • July 15, 2020

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

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

10. Newtonian Gravitation Simulation Help!

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

11. Drake Equation

    By paulsutton, June 18, 2020
    • 3 replies
    • 1.1k views
    • 
    • Mordred
    • June 19, 2020

12. Physicists Announce Potential Dark Matter Breakthrough

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

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

    By mo.sabith, June 13, 2020
    • 22 replies
    • 2.4k views
    • 
    • Mordred
    • June 17, 2020

14. Does outer space have drag?

    By visinedrops, June 15, 2020
    • 18 replies
    • 2.9k views
    • 
    • J.C.MacSwell
    • June 17, 2020

15. Fermi paradox solutions

    By compute, June 8, 2020
    • 8 replies
    • 1.6k views
    • 
    • joigus
    • June 11, 2020

16. Inconsistencies between recession speeds and distance to far objects

    By Halc, June 7, 2020
    • 9 replies
    • 1.6k views
    • 
    • Mordred
    • June 11, 2020

17. What is dark matter?

    By KANDEL, December 26, 2019
    • 4 replies
    • 1.6k views
    • 
    • qidran
    • June 4, 2020

18. Black Hole-Dark Energy Thruster?

    By Jack Jectivus, May 31, 2020
    • 6 replies
    • 1.3k views
    • 
    • Janus
    • May 31, 2020

19. First image of massive black hole

    By Bmpbmp1975, March 30, 2020
    • 3 replies
    • 1.2k views
    • 
    • Airbrush
    • May 29, 2020

20. kinetic energy and black hole formation

    By rjbeery, April 29, 2020
    • 24 replies
    • 2.6k views
    • 
    • Markus Hanke
    • May 16, 2020

21. Is there an advantage to making ones own telescope

    By Delberty, May 13, 2020
    • 6 replies
    • 1.3k views
    • 
    • Danijel Gorupec
    • May 14, 2020

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

    By Bmpbmp1975, April 8, 2020
    • 125 replies
    • 357.3k views
    • 
    • swansont
    • April 27, 2020

23. Brian Cox, gotta love him

    By Bmpbmp1975, April 26, 2020
    • 3 replies
    • 1.3k views
    • 
    • swansont
    • April 26, 2020

24. Question about merging supermassive black holes 1 2

    By Bmpbmp1975, April 19, 2020
    • 28 replies
    • 13.4k views
    • 
    • Strange
    • April 25, 2020

25. help with gamma ray burst formula.

    By 𝐠𝛂𝕞𝕞𝛂 β𝐔𝙍𝐒𝐓, April 22, 2020
    • 1 reply
    • 969 views
    • 
    • Strange
    • April 22, 2020