Astronomy and Cosmology

3708 topics in this forum

1. Explanation for Lunar Maria (??)

   By Widdekind, December 17, 2009
   • 12 replies
   • 2.7k views
   • 
   • Widdekind
   • December 22, 2009

2. Article: Did the Universe Have a Beginning?

   By jvanhalderen, August 20, 2002
   • 10 replies
   • 2.7k views
   • 
   • aman
   • January 6, 2003

3. Can BINARY HABITABLE planets occur?

   By Jenab, May 21, 2004
   • 3 replies
   • 2.7k views
   • 
   • Jenab
   • May 24, 2004

4. explanation of mechanism of moon capturing 1 2

   By Jon Steensen, May 4, 2018
   • 26 replies
   • 2.7k views
   • 
   • Airbrush
   • May 7, 2018

5. Relativity with regard to CMBR and galaxy types 1 2

   By MarkE, July 21, 2021
   • 26 replies
   • 2.7k views
   • 
   • beecee
   • August 6, 2021

6. WMAP data due out Thursday

   By Martin, March 14, 2006
   • 24 replies
   • 2.6k views
   • 
   • aguy2
   • March 21, 2006

7. Big Bang Theory (Horizon Problem): Why is it assumed the universe began anisoptropic?

   By Sorcerer, June 7, 2015
   • 15 replies
   • 2.6k views
   • 
   • Sorcerer
   • June 8, 2015

8. Temperature of Space

   By stevo247, February 25, 2008
   • 19 replies
   • 2.6k views
   • 
   • antimatter
   • February 29, 2008

9. At what redshift does energy density of matter = energy density of radiation?

   By zeion, March 15, 2010
   • 2 replies
   • 2.6k views
   • 
   • zeion
   • March 15, 2010

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

    By Photon Guy, October 5, 2023
    • 45 replies
    • 2.6k views
    • 
    • TheVat
    • February 14

11. Disadvantages/ Disproving Dark Matter and Energy?

    By CherryTarantino, June 21, 2012
    • 4 replies
    • 2.6k views
    • 
    • zapatos
    • June 21, 2012

12. Planets that live forever

    By MirceaKitsune, May 12, 2014
    • 15 replies
    • 2.6k views
    • 
    • Moontanman
    • October 15, 2015

13. List of possible systems containing life includes Alpha Centauri B but not A???

    By RichF, February 20, 2006
    • 10 replies
    • 2.6k views
    • 
    • RichF
    • February 24, 2006

14. I need help answering these questions...

    By hunter4lyf, September 23, 2011
    • 8 replies
    • 2.6k views
    • 
    • tomgwyther
    • October 1, 2011

15. Spacetime and Matter Energy: 1 2

    By beecee, October 1, 2017
    • 30 replies
    • 2.6k views
    • 
    • beecee
    • October 3, 2017

16. Stellar engine

    By Curious layman, January 1, 2020
    • 15 replies
    • 2.6k views
    • 
    • J.C.MacSwell
    • January 3, 2020

17. Time on other planets

    By DRU, October 18, 2005
    • 21 replies
    • 2.6k views
    • 
    • CanadaAotS
    • October 30, 2005

18. Colonisation

    By Radical Edward, August 18, 2002
    • 11 replies
    • 2.6k views
    • 
    • aman
    • November 11, 2002

19. What caused the big bang?

    By Genecks, May 4, 2014
    • 13 replies
    • 2.6k views
    • 
    • petrushka.googol
    • June 1, 2014

20. Typhoons and galaxies

    By Bart, November 24, 2013
    • 18 replies
    • 2.6k views
    • 
    • Ophiolite
    • December 16, 2013

21. Gravity

    By Zeo, November 20, 2002
    • 12 replies
    • 2.6k views
    • 
    • JoeDaWolf
    • May 7, 2003

22. Any good orrery software out there?

    By mzatanoskas, October 26, 2009
    • 5 replies
    • 2.6k views
    • 
    • mzatanoskas
    • October 27, 2009

23. Looking at the past

    By morgsboi, November 5, 2011
    • 18 replies
    • 2.6k views
    • 
    • Summerwind
    • November 10, 2011

24. More planets or not??

    By apollo2011, May 8, 2003
    • 16 replies
    • 2.6k views
    • 
    • Dudde
    • May 21, 2003

25. Have we sent a probe to Uranus?

    By psi20, April 28, 2004
    • 9 replies
    • 2.6k views
    • 
    • RICHARDBATTY
    • September 11, 2004