Astronomy and Cosmology

3705 topics in this forum

1. engineering and cosmology

   By fencewalker, April 4, 2018
   • 7 replies
   • 897 views
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   • Airbrush
   • April 5, 2018

2. An unknown source of planetary energy? 1 2 3 4

   By Moreno, September 15, 2017
   • 91 replies
   • 9.7k views
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   • jlowe22
   • March 31, 2018

3. The physics of Peter F. Hamilton's Nova Bombs?

   By Fanghur, February 2, 2018
   • 3 replies
   • 2.1k views
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   • Fanghur
   • March 30, 2018

4. Part of the Big Bang perplexes me 1 2

   By gwb, March 16, 2018
   • 33 replies
   • 3.2k views
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   • Airbrush
   • March 28, 2018

5. Photons

   By Much Ado, March 26, 2018
   • 11 replies
   • 1.4k views
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   • Area54
   • March 27, 2018

6. I created this space composition with my VFX software, and wonder if it looks like something known. if yes, what's the name of the phenomenon

   By mtruchon, March 14, 2018
   • 2 replies
   • 688 views
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   • mtruchon
   • March 14, 2018

7. Astronomy laser pointers

   By wallflash, March 2, 2018
   • 6 replies
   • 1.2k views
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   • John Cuthber
   • March 4, 2018

8. Water, water, everywhere!!

   By beecee, March 1, 2018
   • 0 replies
   • 638 views
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   • beecee
   • March 1, 2018

9. Presentation: Worldwide Digital Sundial

   By angelsun, February 28, 2018
   • 0 replies
   • 564 views
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   • angelsun
   • February 28, 2018

10. Black Holes and Gaseous Giants:

    By beecee, February 28, 2018
    • 0 replies
    • 698 views
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    • beecee
    • February 28, 2018

11. Observation of the earliest stars

    By Strange, February 28, 2018
    • 1 reply
    • 756 views
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    • beecee
    • February 28, 2018

12. Your theories on anti-matter? 1 2

    By nightsky, January 26, 2018
    • 26 replies
    • 2.6k views
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    • Strange
    • February 28, 2018

13. How can you measure distances across space?

    By ManifestDragon, February 26, 2018
    • 2 replies
    • 789 views
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    • Janus
    • February 26, 2018

14. Life on other planets; is water really the primary factor?

    By dstebbins, February 4, 2018
    • 24 replies
    • 1.8k views
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    • Moontanman
    • February 25, 2018

15. Another test for Einstein:

    By beecee, February 22, 2018
    • 0 replies
    • 631 views
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    • beecee
    • February 22, 2018

16. Tidal Gravitational Effects and Frame Dragging:

    By beecee, February 20, 2018
    • 0 replies
    • 696 views
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    • beecee
    • February 20, 2018

17. Ultra Massive Black Holes:

    By beecee, February 20, 2018
    • 0 replies
    • 615 views
    • 
    • beecee
    • February 20, 2018

18. The Nature of Time

    By Rumfrd, February 15, 2018
    • 1 reply
    • 773 views
    • 
    • hypervalent_iodine
    • February 15, 2018

19. Where does gravity (most likely) come from?

    By dordle-loddle, July 30, 2017
    • 16 replies
    • 3.3k views
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    • Airbrush
    • February 13, 2018

20. Light and black holes

    By billasker, February 12, 2018
    • 2 replies
    • 886 views
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    • beecee
    • February 13, 2018

21. New White Dwarf Mass Limit

    By T. McGrath, February 2, 2018
    • 4 replies
    • 1.4k views
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    • T. McGrath
    • February 7, 2018

22. Deuterium star?

    By Moontanman, February 7, 2018
    • 5 replies
    • 2.2k views
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    • dimreepr
    • February 7, 2018

23. Big Bang - doubts ?

    By ravell, January 21, 2018
    • 9 replies
    • 2.2k views
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    • Strange
    • January 28, 2018

24. Is space folding a good method of space travel (if it is for real) 1 2

    By Lekgolo555, February 10, 2007
    • 42 replies
    • 41.2k views
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    • Feralwrath
    • January 22, 2018

25. Can you witness the birth of the Universe?

    By Madheart918, January 8, 2018
    • 15 replies
    • 2.2k views
    • 
    • MigL
    • January 16, 2018