Astronomy and Cosmology

3685 topics in this forum

1. Lighting questions on the Perseverance landing video. 1 2

   By AlexandrKushnirtshuk, February 25, 2021
   • 41 replies
   • 3.8k views
   • 
   • Phi for All
   • February 27, 2021

2. Dark Matter collapsing to Super Massive Black Holes:

   By beecee, February 24, 2021
   • 0 replies
   • 528 views
   • 
   • beecee
   • February 24, 2021

3. Vacuum pressure of space

   By JustinW, January 11, 2012
   • 16 replies
   • 5.5k views
   • 
   • MigL
   • February 22, 2021

4. Why is there something rather than nothing? 1 2 3

   By Vexen, March 16, 2019
   • 50 replies
   • 7.9k views
   • 
   • MigL
   • February 20, 2021

5. MOND (split from New Study Claims Dark Matter Doesn’t Exist)

   By martillo, February 19, 2021
   • 3 replies
   • 555 views
   • 
   • Markus Hanke
   • February 20, 2021

6. Universe expanding...

   By Externet, February 17, 2021
   • 12 replies
   • 1.4k views
   • 
   • zapatos
   • February 18, 2021

7. Eternal universe (split from Universe expanding...)

   By Airbrush, February 17, 2021
   • 5 replies
   • 766 views
   • 
   • swansont
   • February 17, 2021

8. Matter travelling faster than speed of light

   By Ayden, February 7, 2021
   • 11 replies
   • 1.3k views
   • 
   • Ayden
   • February 11, 2021

9. Missing mass (split from Dark Matter)

   By SergUpstart, February 7, 2021
   • 2 replies
   • 601 views
   • 
   • beecee
   • February 7, 2021

10. What are the explanations for greater than C space-time expansion? 1 2

    By wucko, May 9, 2012
    • 47 replies
    • 7.8k views
    • 
    • Markus Hanke
    • February 6, 2021

11. Why Gravity Exist??

    By Harshit Mishra, February 1, 2021
    • 3 replies
    • 793 views
    • 
    • Phi for All
    • February 1, 2021

12. The affect of space weather

    By bear33, January 19, 2021
    • 7 replies
    • 981 views
    • 
    • cannongray
    • January 27, 2021

13. Our perspective of the Sun

    By Adamchiv, January 25, 2021
    • 24 replies
    • 1.9k views
    • 
    • iNow
    • January 26, 2021

14. Another Dumb t=0 Question

    By sethoflagos, January 24, 2021
    • 7 replies
    • 855 views
    • 
    • Markus Hanke
    • January 26, 2021

15. The Fermi Paradox:

    By beecee, January 24, 2021
    • 1 reply
    • 790 views
    • 
    • mathematic
    • January 24, 2021

16. Lost Space

    By sethoflagos, January 24, 2021
    • 2 replies
    • 795 views
    • 
    • sethoflagos
    • January 24, 2021

17. Spacecraft that can be used for microgravity experiments

    By bear33, January 20, 2021
    • 0 replies
    • 675 views
    • 
    • bear33
    • January 20, 2021

18. An infinite and eternal universe 1 2

    By ProximaCentauri, April 6, 2020
    • 35 replies
    • 67.9k views
    • 
    • beecee
    • January 19, 2021

19. Researchers find Mars has a Chandler wobble

    By beecee, January 11, 2021
    • 0 replies
    • 578 views
    • 
    • beecee
    • January 11, 2021

20. Communication with other life forms.

    By Kemsley29, January 2, 2021
    • 0 replies
    • 585 views
    • 
    • Kemsley29
    • January 2, 2021

21. Should we reply to the WOW! Signal?

    By alfa015222, November 14, 2020
    • 20 replies
    • 2.8k views
    • 
    • joigus
    • January 2, 2021

22. purpose of planets

    By Nader, July 29, 2017
    • 16 replies
    • 3.5k views
    • 
    • Phi for All
    • January 2, 2021

23. How does one compute the sideways velocity of a planet? 1 2

    By captcass, December 29, 2020
    • 31 replies
    • 63.8k views
    • 
    • Phi for All
    • December 30, 2020

24. Big bang expansion (split from Time is a bubble)

    By QuantumT, December 28, 2020
    • 3 replies
    • 580 views
    • 
    • MigL
    • December 28, 2020

25. Expansion/Inflation and the Separation Velocity

    By geordief, December 26, 2020
    • 8 replies
    • 1.1k views
    • 
    • Markus Hanke
    • December 27, 2020