Astronomy and Cosmology

3708 topics in this forum

1. Just because a star is 13b lya doesn't mean it is 13b years old

   By Realitycheck, December 25, 2010
   • 9 replies
   • 2.2k views
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   • Spyman
   • January 24, 2011

2. Could the Universe be Collapsing?

   By aguy2, November 15, 2004
   • 12 replies
   • 2.2k views
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   • aguy2
   • January 27, 2005

3. Question about the big crunch. Opposite of big bang…

   By redvolution, April 8, 2006
   • 11 replies
   • 2.2k views
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   • sunspot
   • April 22, 2006

4. SETI@Home

   By Nicholas Kang, July 7, 2014
   • 19 replies
   • 2.2k views
   • 
   • GeeKay
   • September 25, 2014

5. The expansion of space and redshift of light

   By Chromed1, April 20, 2010
   • 1 reply
   • 2.2k views
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   • Spyman
   • April 21, 2010

6. Is it feasible to soft land an asteroid on Earth?

   By Nereus, April 22, 2012
   • 6 replies
   • 2.2k views
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   • insane_alien
   • May 2, 2012

7. Von Neumann probes may be cause of origin of life

   By cambrian_exp, July 19, 2005
   • 11 replies
   • 2.2k views
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   • Ophiolite
   • July 27, 2005

8. Lee Smolin's cosmological natural selection.

   By too-open-minded, September 27, 2012
   • 11 replies
   • 2.2k views
   • 
   • too-open-minded
   • October 1, 2012

9. How did we find the location of the Big Bang?

   By BrightQuark, June 25, 2013
   • 24 replies
   • 2.2k views
   • 
   • BrightQuark
   • June 27, 2013

10. building a neutrino detector ?

    By Widdekind, January 4, 2012
    • 11 replies
    • 2.2k views
    • 
    • swansont
    • January 8, 2012

11. Moon induces tides in Atmosphere ??

    By Widdekind, June 3, 2011
    • 7 replies
    • 2.2k views
    • 
    • Widdekind
    • June 7, 2011

12. Is the universe really 13.7 billion years old?

    By Kurious12, May 31, 2022
    • 12 replies
    • 2.2k views
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    • Airbrush
    • July 11, 2022

13. Infinite large to small. A taste.

    By aman, October 29, 2002
    • 8 replies
    • 2.2k views
    • 
    • aman
    • October 31, 2002

14. the Ambjorn Jurkiewicz Loll paper

    By Martin, June 17, 2004
    • 4 replies
    • 2.2k views
    • 
    • Martin
    • June 19, 2004

15. Astrophysics?

    By Mike Kovich, December 19, 2005
    • 14 replies
    • 2.2k views
    • 
    • s pepperchin
    • February 27, 2006

16. Apophis; What would YOU do?

    By Benjamin, September 28, 2007
    • 19 replies
    • 2.2k views
    • 
    • Edtharan
    • October 16, 2007

17. The iron core of stars; super nova

    By pioneer, August 17, 2007
    • 5 replies
    • 2.2k views
    • 
    • pioneer
    • August 18, 2007

18. Furthest redshift possible?

    By Baby Astronaut, September 14, 2008
    • 17 replies
    • 2.2k views
    • 
    • Martin
    • January 10, 2009

19. A Planet Changeing it's Orbit

    By SquareHiccup, June 18, 2005
    • 5 replies
    • 2.2k views
    • 
    • danny8522003
    • July 15, 2005

20. All life is the same age.

    By pretender, April 14, 2006
    • 13 replies
    • 2.2k views
    • 
    • Ragib
    • May 11, 2006

21. Gravity Question

    By Stumblebum, May 18, 2005
    • 17 replies
    • 2.2k views
    • 
    • Stumblebum
    • June 25, 2005

22. Black Hole time travel?

    By Inquisitor, April 2, 2009
    • 11 replies
    • 2.2k views
    • 
    • froarty
    • May 5, 2009

23. Space Travel

    By cdinesh1, February 25, 2006
    • 14 replies
    • 2.2k views
    • 
    • s pepperchin
    • February 27, 2006

24. Alien Bacteria Claimed Found in Meteorite

    By Airbrush, March 7, 2011
    • 3 replies
    • 2.2k views
    • 
    • Airbrush
    • March 8, 2011

25. The Universe sprang out of Nothing

    By Gian, February 28, 2013
    • 7 replies
    • 2.2k views
    • 
    • siderman
    • March 19, 2013