Astronomy and Cosmology

3713 topics in this forum

1. Lost Planet:

   By beecee, April 17, 2018
   • 2 replies
   • 921 views
   • 
   • Airbrush
   • April 18, 2018

2. Testing General Relativity and Gravity:

   By beecee, April 17, 2018
   • 0 replies
   • 627 views
   • 
   • beecee
   • April 17, 2018

3. Artificial Gravity on the ISS 1 2

   By Airbrush, April 7, 2018
   • 29 replies
   • 3.1k views
   • 
   • Airbrush
   • April 16, 2018

4. Space is the ultimate antecedent 1 2

   By gwb, March 26, 2018
   • 32 replies
   • 4.1k views
   • 
   • Mordred
   • April 13, 2018

5. Basic rule for the Atmospheric Reentry Time of non powered Glider Class vehicles

   By LaurieAG, April 7, 2018
   • 3 replies
   • 924 views
   • 
   • LaurieAG
   • April 11, 2018

6. Handbook for New Actors in Space

   By Phi for All, April 10, 2018
   • 0 replies
   • 992 views
   • 
   • Phi for All
   • April 10, 2018

7. More evidence for Dark Matter:

   By beecee, March 28, 2018
   • 16 replies
   • 2.1k views
   • 
   • Strange
   • April 9, 2018

8. Astronomers find 72 bright and fast explosions

   By beecee, April 5, 2018
   • 0 replies
   • 616 views
   • 
   • beecee
   • April 5, 2018

9. engineering and cosmology

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

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

    By Moreno, September 15, 2017
    • 91 replies
    • 11k views
    • 
    • jlowe22
    • March 31, 2018

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

    By Fanghur, February 2, 2018
    • 3 replies
    • 2.4k views
    • 
    • Fanghur
    • March 30, 2018

12. Part of the Big Bang perplexes me 1 2

    By gwb, March 16, 2018
    • 33 replies
    • 3.6k views
    • 
    • Airbrush
    • March 28, 2018

13. Photons

    By Much Ado, March 26, 2018
    • 11 replies
    • 1.6k views
    • 
    • Area54
    • March 27, 2018

14. 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
    • 739 views
    • 
    • mtruchon
    • March 14, 2018

15. Astronomy laser pointers

    By wallflash, March 2, 2018
    • 6 replies
    • 1.4k views
    • 
    • John Cuthber
    • March 4, 2018

16. Water, water, everywhere!!

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

17. Presentation: Worldwide Digital Sundial

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

18. Black Holes and Gaseous Giants:

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

19. Observation of the earliest stars

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

20. Your theories on anti-matter? 1 2

    By nightsky, January 26, 2018
    • 26 replies
    • 2.9k views
    • 
    • Strange
    • February 28, 2018

21. How can you measure distances across space?

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

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

    By dstebbins, February 4, 2018
    • 24 replies
    • 2.1k views
    • 
    • Moontanman
    • February 25, 2018

23. Another test for Einstein:

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

24. Tidal Gravitational Effects and Frame Dragging:

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

25. Ultra Massive Black Holes:

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