Astronomy and Cosmology

3692 topics in this forum

1. Space dimensions

   By Tesseract999, August 2, 2019
   • 16 replies
   • 1.5k views
   • 
   • Strange
   • August 3, 2019

2. Achieving Mars-Earth comunication High-Bandwidth

   By MaximT, July 28, 2019
   • 16 replies
   • 1.7k views
   • 
   • swansont
   • July 29, 2019

3. A New Area Law in General Relativity, questions.

   By beecee, July 26, 2019
   • 7 replies
   • 935 views
   • 
   • Mordred
   • July 27, 2019

4. Can gravitational waves be affected by matter?

   By Ghideon, May 21, 2019
   • 23 replies
   • 2.1k views
   • 
   • swansont
   • July 25, 2019

5. A basic question about the big bang

   By Courage, July 17, 2019
   • 7 replies
   • 1.2k views
   • 
   • Mordred
   • July 25, 2019

6. Asteroid

   By Leewright10, July 24, 2019
   • 4 replies
   • 938 views
   • 
   • Mordred
   • July 25, 2019

7. All observed blue-shifted galaxies are in our Hubble horizon.

   By StringJunky, July 23, 2019
   • 2 replies
   • 624 views
   • 
   • StringJunky
   • July 23, 2019

8. Mars colony of 500,000 people may not be possible 1 2

   By nec209, June 15, 2019
   • 44 replies
   • 5.3k views
   • 
   • Moontanman
   • July 18, 2019

9. Asteroids As Gas Stations

   By Airbrush, July 11, 2019
   • 19 replies
   • 2k views
   • 
   • Curious layman
   • July 16, 2019

10. Effects of Rotation Around the Axis

    By Weitter Duckss, July 16, 2019
    • 8 replies
    • 903 views
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    • swansont
    • July 16, 2019

11. heat transfer in stars

    By Lizzzza, July 14, 2019
    • 0 replies
    • 620 views
    • 
    • Lizzzza
    • July 14, 2019

12. Dark Energy

    By geordief, July 13, 2019
    • 1 reply
    • 693 views
    • 
    • Strange
    • July 13, 2019

13. Space Radiation: Astronauts: Cancer:

    By beecee, July 11, 2019
    • 3 replies
    • 773 views
    • 
    • Curious layman
    • July 12, 2019

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

    By Elendirs, April 8, 2019
    • 121 replies
    • 10.9k views
    • 
    • Strange
    • July 12, 2019

15. Viewing distant galaxies in unprecedented detail

    By beecee, July 10, 2019
    • 1 reply
    • 685 views
    • 
    • Mordred
    • July 11, 2019

16. The speed change of Oumuamua

    By peglerbc, December 29, 2018
    • 7 replies
    • 1.5k views
    • 
    • swansont
    • July 10, 2019

17. 3 facts maybe you don't know about antimatter

    By alfa015, April 14, 2019
    • 6 replies
    • 1.3k views
    • 
    • Mordred
    • July 10, 2019

18. What is the universe?

    By PrimalMinister, May 23, 2019
    • 22 replies
    • 1.5k views
    • 
    • The Shadow
    • July 10, 2019

19. Cosmic Rays.

    By Bushranger, July 7, 2019
    • 14 replies
    • 1.3k views
    • 
    • Bushranger
    • July 8, 2019

20. Big Bang spin

    By loidokaar, July 7, 2019
    • 5 replies
    • 740 views
    • 
    • StringJunky
    • July 7, 2019

21. The best space simulator in history - Space Engine

    By goldenfort, July 2, 2019
    • 2 replies
    • 760 views
    • 
    • swansont
    • July 2, 2019

22. Exoplanets (split from Science videos)

    By Airbrush, June 16, 2019
    • 18 replies
    • 1.8k views
    • 
    • swansont
    • July 1, 2019

23. Which theory is more preferred about universe expansion?

    By John Conner, June 27, 2019
    • 3 replies
    • 858 views
    • 
    • John Conner
    • June 28, 2019

24. Multiverse (split from Discussable Topics)

    By beecee, June 22, 2019
    • 2 replies
    • 672 views
    • 
    • beecee
    • June 22, 2019

25. Neil deGrasse Tyson says it’s ‘very likely’ the universe is a simulation 1 2

    By Polinski, June 21, 2019
    • 30 replies
    • 2.7k views
    • 
    • swansont
    • June 21, 2019