Astronomy and Cosmology

3686 topics in this forum

1. Astronomy links 1 2 3 4 5

   By Martin, May 24, 2004
   • 105 replies
   • 103.8k views
   • 
   • swansont
   • June 25, 2021

2. Cosmological Principle 1 2 3

   By Mordred, May 30, 2015
   • 52 replies
   • 36.1k views
   • 
   • michel123456
   • June 22, 2020

3. Cosmo Basics

   By Martin, October 19, 2008
   • 13 replies
   • 27.4k views
   • 
   • swansont
   • August 3, 2018

4. Using BOINC / seti@home?

   By Sayonara, August 29, 2010
   • 10 replies
   • 20.5k views
   • 
   • Altruist1
   • March 26, 2016

5. Cosmological Redshift and metric expansion 1 2 3 4

   By AbstractDreamer, May 23, 2023
   • 90 replies
   • 5k views
   • 
   • Mordred
   • 9 hours ago

6. If Black holes slowly evaporate over time is there a point where they stop being a black hole?

   By MSC, Saturday at 06:46 PM
   • 4 replies
   • 135 views
   • 
   • MSC
   • Yesterday at 02:37 PM

7. Asteroid defense ideas

   By Airbrush, April 17
   • 10 replies
   • 279 views
   • 
   • Ken Fabian
   • Yesterday at 12:24 AM

8. Space Expansion, wavelength and energy density

   By AbstractDreamer, August 28, 2023
   • 7 replies
   • 583 views
   • 
   • AbstractDreamer
   • Friday at 10:08 PM

9. Sunshine on Titan 1 2

   By Gian, March 22
   • 27 replies
   • 819 views
   • 
   • swansont
   • April 14
10. Introduction to the Theory of Unity

    Topic was moved to forum Speculations

11. A Speculative Description of Dark Matter and Dark Energy

    Topic was moved to forum Speculations

12. Monolith asteroids: a Silent Order.

    By GeeKay, April 5
    • 2 replies
    • 168 views
    • 
    • GeeKay
    • April 5

13. The Beginning of the Universe 1 2 3 4 6

    By Chris Sawatsky, November 12, 2023
    • 145 replies
    • 4.4k views
    • 
    • Mordred
    • April 5

14. Interview invitation for YouTube channel

    By Viktoriia, April 4
    • 1 reply
    • 122 views
    • 
    • swansont
    • April 4
15. RICHARD DAWKINS ❤ CANCEL CULTURE (or not)

    Topic was moved to forum Politics

16. Gravitational effect and pressure of photons in Friedmann equation?

    By icarus2, March 31
    • 12 replies
    • 342 views
    • 
    • Mordred
    • April 2

17. I really need your help with some calculations 1 2

    By tmdarkmatter, March 17
    • 28 replies
    • 683 views
    • 
    • tmdarkmatter
    • March 23

18. Expansion of space- Split from: Alabama court - "Embryos are people"

    By npts2020, March 1
    • 16 replies
    • 389 views
    • 
    • MigL
    • March 10

19. Novel Dark Matter & Energy Hypothesis

    By exchemist, March 9
    • 1 reply
    • 173 views
    • 
    • Genady
    • March 9

20. Airlines And Other Private Companies Going Into The Space Industry 1 2

    By Photon Guy, October 5, 2023
    • 45 replies
    • 1.8k views
    • 
    • TheVat
    • February 14

21. Bringing Samples Back From Mars

    By Photon Guy, January 31
    • 5 replies
    • 358 views
    • 
    • Ken Fabian
    • February 5

22. Could we observe the present ? 1 2

    By Time Traveler, February 1
    • 30 replies
    • 1.4k views
    • 
    • Phi for All
    • February 3

23. Object faster or just as fast as light

    By Irma, August 28, 2023
    • 16 replies
    • 1.1k views
    • 
    • Janus
    • January 30

24. Determining distance (split from Cosmic Megastructure Challenges Theories of the Universe

    By Luc Turpin, January 13
    • 0 replies
    • 213 views
    • 
    • Luc Turpin
    • January 13

25. Space Exploration Within Our Solar System

    By Chris Sawatsky, January 11
    • 2 replies
    • 224 views
    • 
    • Phi for All
    • January 12