Astronomy and Cosmology

3527 topics in this forum

1. Astronomy links 1 2 3 4 5

   By Martin, May 24, 2004
   • 103 replies
   • 92.3k views
   • 
   • paulsutton
   • August 3, 2020

2. Cosmological Principle 1 2 3

   By Mordred, May 30, 2015
   • 52 replies
   • 30k views
   • 
   • michel123456
   • June 22, 2020

3. Cosmo Basics

   By Martin, October 19, 2008
   • 13 replies
   • 25.3k views
   • 
   • swansont
   • August 3, 2018

4. Using BOINC / seti@home?

   By Sayonara, August 29, 2010
   • 10 replies
   • 18.7k views
   • 
   • Altruist1
   • March 26, 2016
5. Boeing 737 max - does the system give 15 seconds for pilot to disable the autopilot system?

   Topic was moved to forum Engineering

6. The strong force question/proposal

   By QuantumT, June 12
   • 3 replies
   • 214 views
   • 
   • QuantumT
   • June 12

7. Interesting space facts

   By ethelbertmagnus, June 10
   • 2 replies
   • 149 views
   • 
   • beecee
   • June 10

8. Do you truly believe modern scientists have written the end of this story?

   By OdinSon2k11, June 6
   • 8 replies
   • 237 views
   • 
   • Endy0816
   • June 6

9. How does General Relativity predict zero volume/infinite density of Black holes?

   By Nigel Denning, May 28
   • 2 replies
   • 201 views
   • 
   • swansont
   • May 28

10. Dark matter mystery.

    By AlexandrKushnirtshuk, May 27
    • 3 replies
    • 178 views
    • 
    • Phi for All
    • May 27

11. Earth The Size Of A Tennis Ball

    By Photon Guy, March 1
    • 3 replies
    • 376 views
    • 
    • iNow
    • May 21

12. Space - Can Private Industry actually compete with China?

    By DeepSeaBase, May 11
    • 14 replies
    • 456 views
    • 
    • SpaceJac111
    • May 21

13. Space Travel - is it leisurely possible? (Can we tolerate risk?)

    By DeepSeaBase, May 11
    • 6 replies
    • 306 views
    • 
    • beecee
    • May 20

14. Get ready for the landing of Perseverance ! 1 2

    By Airbrush, February 11
    • 35 replies
    • 1.5k views
    • 
    • SpaceJac111
    • May 20

15. The universe is flat? (split from Time for a different view)

    By MPMin, May 18
    • 19 replies
    • 594 views
    • 
    • studiot
    • May 20

16. Correspondence between mass/radius of both the observable universe and black holes

    By MarkE, May 12
    • 9 replies
    • 304 views
    • 
    • joigus
    • May 18

17. SpaceX 1 2 3 4 10

    By ThatSpaceBoy, April 16
    • 230 replies
    • 4.3k views
    • 
    • dimreepr
    • May 12

18. There may be 14 antimatter objects hiding in the Milky Way. These objects are called anti-stars.

    By SergUpstart, May 4
    • 8 replies
    • 362 views
    • 
    • swansont
    • May 5

19. Dark Matter and Suspiciously Warm Planets:

    By beecee, May 4
    • 1 reply
    • 203 views
    • 
    • beecee
    • May 5

20. False picture possible on optical telescopes

    By Yanosh, May 4
    • 3 replies
    • 239 views
    • 
    • beecee
    • May 4

21. New exoplanet candidate found in the habitable zone of the closest star system

    By USer2343, February 28
    • 7 replies
    • 451 views
    • 
    • beecee
    • May 3

22. Russias submarine launched satellite

    By IDNeon, May 3
    • 2 replies
    • 195 views
    • 
    • Phi for All
    • May 3

23. April 12th: 1961.

    By beecee, April 9
    • 21 replies
    • 681 views
    • 
    • beecee
    • May 3

24. Paradox of visual and actual positions in space.

    By AlexandrKushnirtshuk, April 13
    • 8 replies
    • 339 views
    • 
    • IDNeon
    • May 3

25. Could you use Carbon Nanotube Yarn/Twistron Yarn and a black hole to theoretically create a Infinite Energy Source?

    By Liliander, April 27
    • 1 reply
    • 218 views
    • 
    • swansont
    • April 27