Astronomy and Cosmology

3708 topics in this forum

1. Star exploded, survived, and exploded again

   By beecee, November 9, 2017
   • 1 reply
   • 779 views
   • 
   • T. McGrath
   • November 10, 2017

2. Galaxy strings and redshifts

   By aramis720, November 7, 2017
   • 7 replies
   • 1.2k views
   • 
   • aramis720
   • November 9, 2017

3. Why do we think there is dark matter and dark energy?

   By Anthony Morris, October 12, 2017
   • 24 replies
   • 3.1k views
   • 
   • Strange
   • November 2, 2017

4. Dwarf Planet Ceres...

   By Orion1, August 31, 2015
   • 4 replies
   • 1.2k views
   • 
   • Janus
   • November 2, 2017

5. LIGO Gravity waves 1 2

   By reerer, October 22, 2017
   • 45 replies
   • 4.1k views
   • 
   • Strange
   • October 31, 2017

6. Astronomy XXX

   By reerer, October 26, 2017
   • 22 replies
   • 3.4k views
   • 
   • hypervalent_iodine
   • October 31, 2017

7. Black Hole Collisions

   By geordief, October 27, 2017
   • 7 replies
   • 977 views
   • 
   • Strange
   • October 28, 2017

8. Estimate the size of our universe

   By Dream-Runner, October 17, 2017
   • 8 replies
   • 1.3k views
   • 
   • Strange
   • October 17, 2017

9. Black hole mergers (split from LIGO/VIRGO)

   By geordief, October 17, 2017
   • 12 replies
   • 1.1k views
   • 
   • Strange
   • October 17, 2017

10. Microwave Background Radiation???

    By Cosmo_Ken, October 15, 2017
    • 6 replies
    • 1k views
    • 
    • Mordred
    • October 16, 2017

11. Undetected asteroids and Earth

    By Cerebus06, October 4, 2017
    • 7 replies
    • 1.9k views
    • 
    • dimreepr
    • October 16, 2017

12. Are dark matter and dark energy related?

    By Strange, December 27, 2016
    • 13 replies
    • 3.5k views
    • 
    • Vmedvil
    • October 16, 2017

13. Why do all cosmological models assume time flow is the same for everyone in the universe?

    By Aki Tendo, October 15, 2017
    • 6 replies
    • 997 views
    • 
    • Mordred
    • October 15, 2017

14. Missing Matter Found:

    By beecee, October 10, 2017
    • 9 replies
    • 1.4k views
    • 
    • koti
    • October 12, 2017

15. Hulse/Taylor Binary Pulsar System and Gravitational Radiation:

    By beecee, October 8, 2017
    • 4 replies
    • 794 views
    • 
    • beecee
    • October 9, 2017

16. NASA Aftermath of the Chelyabinsk Meteor

    By Sensei, October 8, 2017
    • 0 replies
    • 749 views
    • 
    • Sensei
    • October 8, 2017

17. How singularity in black hole works?

    By Eren, October 6, 2017
    • 5 replies
    • 1.2k views
    • 
    • Endy0816
    • October 7, 2017

18. Is dark energy causing different acceleration speeds?

    By MarkE, September 6, 2017
    • 23 replies
    • 1.7k views
    • 
    • Eise
    • October 5, 2017

19. Spacetime and Matter Energy: 1 2

    By beecee, October 1, 2017
    • 30 replies
    • 2.6k views
    • 
    • beecee
    • October 3, 2017

20. How Does Mercury Really Look Like?

    By Orcus, October 2, 2017
    • 3 replies
    • 3.1k views
    • 
    • Chopsticks
    • October 3, 2017

21. Cosmocalc now good on SFN

    By Mordred, October 3, 2017
    • 0 replies
    • 688 views
    • 
    • Mordred
    • October 3, 2017

22. Black Holes 1 2

    By Paritosh Sontake, September 12, 2017
    • 44 replies
    • 4.1k views
    • 
    • Dubbelosix
    • September 30, 2017

23. Big Bang not an instance of something from nothing? 1 2 3

    By Alfred001, July 26, 2017
    • 64 replies
    • 7.6k views
    • 
    • Mordred
    • September 30, 2017

24. Big Bang evidence discarded ... Not

    By Strange, September 16, 2017
    • 6 replies
    • 1.3k views
    • 
    • Dubbelosix
    • September 28, 2017

25. A planet made of humans

    By Encryptor, September 27, 2017
    • 6 replies
    • 1.4k views
    • 
    • Encryptor
    • September 28, 2017