Astronomy and Cosmology

3689 topics in this forum

1. Researchers find Mars has a Chandler wobble

   By beecee, January 11, 2021
   • 0 replies
   • 586 views
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   • beecee
   • January 11, 2021

2. help needed on adding additional objects to FITS images...

   By cosmosbird888, December 9, 2008
   • 0 replies
   • 585 views
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   • cosmosbird888
   • December 9, 2008

3. I am in need of ...

   By ewmon, March 28, 2010
   • 0 replies
   • 585 views
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   • ewmon
   • March 28, 2010

4. Could you use Carbon Nanotube Yarn/Twistron Yarn and a black hole to theoretically create a Infinite Energy Source?

   By Liliander, April 27, 2021
   • 1 reply
   • 585 views
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   • swansont
   • April 27, 2021

5. lunar eclipse and solstice

   By lemur, December 25, 2010
   • 1 reply
   • 583 views
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   • Moontanman
   • December 25, 2010

6. Solar system books

   By Chriss, October 3, 2015
   • 0 replies
   • 583 views
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   • Chriss
   • October 3, 2015

7. Reason for Establishing first Lunar Outpost:

   By beecee, August 21, 2018
   • 1 reply
   • 580 views
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   • Airbrush
   • August 22, 2018

8. Space and Planetary Probes and Telescopes:

   By beecee, October 13, 2018
   • 0 replies
   • 576 views
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   • beecee
   • October 13, 2018

9. Ultra Massive Black Holes:

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

10. Jobs

    By EdenFechter, January 18, 2022
    • 0 replies
    • 571 views
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    • EdenFechter
    • January 18, 2022

11. What is 'time' in FRW metric ?

    By Widdekind, February 26, 2011
    • 0 replies
    • 570 views
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    • Widdekind
    • February 26, 2011

12. Will universe collapse?

    By vitttorrio, December 11, 2022
    • 4 replies
    • 567 views
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    • Genady
    • December 11, 2022

13. Branes and Dark Energy

    By lawman, February 21, 2010
    • 0 replies
    • 566 views
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    • lawman
    • February 21, 2010

14. MOND (split from New Study Claims Dark Matter Doesn’t Exist)

    By martillo, February 19, 2021
    • 3 replies
    • 563 views
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    • Markus Hanke
    • February 20, 2021

15. Red Shift Question

    By Fly135, July 21, 2022
    • 2 replies
    • 563 views
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    • Fly135
    • July 23, 2022

16. Is expansion an emergent property?

    By Genady, September 2, 2023
    • 17 replies
    • 560 views
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    • TheVat
    • September 2, 2023

17. Simulating various spacetime topologies ?

    By Widdekind, April 7, 2010
    • 0 replies
    • 559 views
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    • Widdekind
    • April 7, 2010

18. Stars revolving on the sky...

    By Externet, August 19, 2022
    • 1 reply
    • 559 views
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    • Sensei
    • August 19, 2022

19. Cosmological redshift, another thought experiment

    By Genady, January 20, 2022
    • 4 replies
    • 558 views
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    • Genady
    • January 20, 2022

20. Lorentz invariant gravity (split from Is Gravity a Force?)

    By SergUpstart, September 1, 2021
    • 1 reply
    • 556 views
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    • swansont
    • September 1, 2021

21. Hubble paints picture of the evolving universe

    By beecee, August 16, 2018
    • 0 replies
    • 555 views
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    • beecee
    • August 16, 2018

22. what is the value of the acceleration of the expansion of the universe?

    By stephaneww, April 28, 2022
    • 0 replies
    • 554 views
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    • stephaneww
    • April 28, 2022

23. Earth's Geocorona Goes Beyond the Moon

    By QuantumT, February 26, 2019
    • 3 replies
    • 549 views
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    • QuantumT
    • February 26, 2019

24. New Horizons Flyby of Ultima Thule on Jan 1st

    By Airbrush, December 30, 2018
    • 0 replies
    • 548 views
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    • Airbrush
    • December 30, 2018

25. Mr

    By Edenjs, December 19, 2022
    • 10 replies
    • 545 views
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    • TheVat
    • December 19, 2022