Astronomy and Cosmology

3686 topics in this forum

1. Best telescope

   By Gian, August 29, 2023
   • 11 replies
   • 632 views
   • 
   • Genady
   • August 31, 2023

2. Tidal Gravitational Effects and Frame Dragging:

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

3. Moon Landing 360

   By Endy0816, August 5, 2021
   • 1 reply
   • 631 views
   • 
   • joigus
   • August 5, 2021

4. Space physicist Hannes Alfven centennial

   By aguest, May 30, 2008
   • 0 replies
   • 630 views
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   • aguest
   • May 30, 2008

5. Entropy and Expansion

   By Eric0728, May 10, 2009
   • 0 replies
   • 627 views
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   • Eric0728
   • May 10, 2009

6. Weakly Interacting Sub-eV Particles

   By Enthalpy, September 11, 2013
   • 0 replies
   • 626 views
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   • Enthalpy
   • September 11, 2013

7. Tides

   By elemental scorpion, September 3, 2018
   • 2 replies
   • 625 views
   • 
   • swansont
   • September 3, 2018

8. cosmic density perturbations grow with time ?

   By Widdekind, December 11, 2012
   • 0 replies
   • 622 views
   • 
   • Widdekind
   • December 11, 2012

9. Why a whole galaxy is turning with unique angular speed

   By Guest Eddie, February 25, 2005
   • 0 replies
   • 621 views
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   • Guest
   • February 25, 2005

10. Cosmocalc now good on SFN

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

11. The nature and origin of Charon's smooth plains

    By Intrigued, April 3, 2019
    • 0 replies
    • 620 views
    • 
    • Intrigued
    • April 3, 2019

12. The Universe's First Molecule Found:

    By beecee, January 3, 2022
    • 4 replies
    • 620 views
    • 
    • exchemist
    • January 3, 2022

13. WHATto build

    By Guest sol, April 17, 2005
    • 0 replies
    • 618 views
    • 
    • Guest
    • April 17, 2005

14. Do black holes the size of a human hand or even smaller exist

    By Achilles, August 23, 2018
    • 3 replies
    • 617 views
    • 
    • Strange
    • August 24, 2018

15. Electric discharge in the Universe?

    By alpha2cen, December 25, 2010
    • 1 reply
    • 613 views
    • 
    • alpha2cen
    • December 27, 2010

16. GLAST in orbit---and tutorials on gammaray astonomy

    By Martin, June 16, 2008
    • 0 replies
    • 612 views
    • 
    • Martin
    • June 16, 2008

17. Has a supernova ever been recorded?

    By gib65, February 25, 2023
    • 6 replies
    • 612 views
    • 
    • Ken Fabian
    • February 27, 2023

18. All observed blue-shifted galaxies are in our Hubble horizon.

    By StringJunky, July 23, 2019
    • 2 replies
    • 611 views
    • 
    • StringJunky
    • July 23, 2019

19. Variation on Solar System Formation:

    By beecee, December 23, 2017
    • 0 replies
    • 610 views
    • 
    • beecee
    • December 23, 2017

20. Two Theoretical Bodies in Space, Time to Collide.

    By Zemy, December 13, 2018
    • 3 replies
    • 610 views
    • 
    • Janus
    • December 14, 2018

21. Lagrangian Points

    By JamesBrown, March 27, 2010
    • 1 reply
    • 608 views
    • 
    • Cap'n Refsmmat
    • March 27, 2010

22. Key to the space exploration?

    By Jibbek, February 12, 2019
    • 2 replies
    • 606 views
    • 
    • beecee
    • February 12, 2019

23. Appropriate Signal to Noise Ratio for CMB Measurements? (Wmap, Cobe, Planck)

    By The victorious truther, June 19, 2021
    • 0 replies
    • 606 views
    • 
    • The victorious truther
    • June 19, 2021

24. Gravitational pulses looking for clarification

    By Njwythe, May 23, 2023
    • 11 replies
    • 606 views
    • 
    • Genady
    • May 24, 2023

25. Geologically Recorded Asteroid Impacts...

    By Orion1, December 5, 2020
    • 1 reply
    • 605 views
    • 
    • swansont
    • December 5, 2020