Astronomy and Cosmology

3692 topics in this forum

1. Size a solution to Fermi Paradox? 1 2 3 4

   By coderage9100, November 16, 2018
   • 98 replies
   • 11.2k views
   • 
   • dimreepr
   • December 24, 2019

2. What was the Singularity point before the Big Bang?

   By Blind Watchmaker, December 23, 2019
   • 7 replies
   • 1.2k views
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   • Strange
   • December 24, 2019

3. Inside The 24/7 Search For Another Habitable Planet Within 100 Light Years Of Earth

   By alfa015, November 26, 2019
   • 1 reply
   • 774 views
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   • Airbrush
   • November 28, 2019

4. The Square Kilometre Array

   By alfa015, November 15, 2019
   • 0 replies
   • 870 views
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   • alfa015
   • November 15, 2019

5. Sun Black hole

   By Lizwi, November 5, 2019
   • 2 replies
   • 888 views
   • 
   • MigL
   • November 5, 2019

6. Expansion (split from Empty space inside galaxies must be different than empty space outside of them)

   By geordief, November 1, 2019
   • 10 replies
   • 1.3k views
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   • swansont
   • November 4, 2019

7. How strong are pulsar winds?

   By SilentSky23, October 29, 2019
   • 5 replies
   • 1.1k views
   • 
   • swansont
   • October 29, 2019

8. Comet or Asteroid smashes into OUR moon!

   By EastNamibianSpaceMiningCo, October 26, 2019
   • 9 replies
   • 1.4k views
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   • Airbrush
   • October 28, 2019

9. The search for habitable exoplanets in Alpha Centauri

   By alfa015, October 26, 2019
   • 0 replies
   • 738 views
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   • alfa015
   • October 26, 2019

10. A strange hypothetical planet

    By Moreno, September 14, 2018
    • 9 replies
    • 1.8k views
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    • Janus
    • October 14, 2019

11. Treasure From Asteroids 1 2

    By Airbrush, July 25, 2019
    • 36 replies
    • 34.6k views
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    • Moontanman
    • October 13, 2019

12. Help me please, need information on galaxies

    By SergUpstart, October 12, 2019
    • 3 replies
    • 1.2k views
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    • SergUpstart
    • October 12, 2019

13. Star's habitable zone?

    By Moontanman, June 8, 2019
    • 9 replies
    • 1.3k views
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    • Moontanman
    • September 30, 2019

14. Is gravity really "negative energy"?

    By QuantumT, September 25, 2019
    • 11 replies
    • 1.6k views
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    • swansont
    • September 26, 2019

15. Is space infinite or finite?

    By Gater, September 10, 2019
    • 1 reply
    • 1k views
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    • Strange
    • September 10, 2019

16. Who said the Universe had a beginning? 1 2 3 4

    By Gater, August 11, 2019
    • 97 replies
    • 49.9k views
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    • swansont
    • September 5, 2019

17. Chances of a comet hitting us ?

    By boo, September 2, 2019
    • 8 replies
    • 1.5k views
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    • Janus
    • September 3, 2019

18. DIY: Wormhole!

    By QuantumT, August 31, 2019
    • 0 replies
    • 775 views
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    • QuantumT
    • August 31, 2019

19. If you could tour the galaxy what spectacles would you go to see?

    By boo, August 29, 2019
    • 9 replies
    • 1.3k views
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    • swansont
    • August 29, 2019

20. Dark matter = Gravity?

    By QuantumT, August 6, 2019
    • 7 replies
    • 1.4k views
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    • QuantumT
    • August 27, 2019

21. The theory of infinity.

    By Guest123456, August 15, 2019
    • 20 replies
    • 1.8k views
    • 
    • Mordred
    • August 22, 2019

22. Is the dark energy already present as vacuum energy by nature in the equations of general relativity ?

    By stephaneww, April 17, 2019
    • 11 replies
    • 1.5k views
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    • stephaneww
    • August 18, 2019

23. Why is the Earth electrically neutral?

    By Bluemoon, November 20, 2014
    • 11 replies
    • 8.2k views
    • 
    • John Cuthber
    • August 12, 2019

24. Furthest "cloaked BH" found:

    By beecee, August 8, 2019
    • 0 replies
    • 678 views
    • 
    • beecee
    • August 8, 2019

25. The Habitable Exoplanet Hunting Project

    By alfa015, July 13, 2019
    • 1 reply
    • 798 views
    • 
    • alfa015
    • August 6, 2019