Astronomy and Cosmology

3691 topics in this forum

1. What percentage of the universe is antimatter?

   By Sorcerer, December 18, 2015
   • 6 replies
   • 4k views
   • 
   • Strange
   • December 24, 2015

2. Hot Jupiters formed cold ?

   By Widdekind, September 22, 2011
   • 13 replies
   • 4k views
   • 
   • Widdekind
   • March 4, 2012

3. Scary Stuff 1 2

   By us.2u, February 25, 2005
   • 35 replies
   • 4k views
   • 
   • coquina
   • February 26, 2005

4. Magnetic Pole Shift

   By jeheron, November 28, 2004
   • 17 replies
   • 4k views
   • 
   • jeheron
   • November 29, 2004

5. Any Intelligent Life on Earth? 1 2

   By Airbrush, August 21, 2014
   • 33 replies
   • 4k views
   • 
   • Sorcerer
   • October 18, 2015

6. Question about Cosmology 1 2

   By Johnny5, March 1, 2005
   • 49 replies
   • 4k views
   • 
   • Tom Mattson
   • March 8, 2005

7. Is the Universe Spinning?

   By murshid, February 27, 2012
   • 19 replies
   • 4k views
   • 
   • Alberto
   • May 26, 2012

8. Planetary system rotation 1 2

   By elas, September 9, 2010
   • 30 replies
   • 3.9k views
   • 
   • elas
   • September 20, 2010

9. Big Bang Theory? 1 2

   By SkyTeCh05, April 19, 2014
   • 30 replies
   • 3.9k views
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   • Ophiolite
   • April 25, 2014

10. effects of Metallicity on stars ?

    By Widdekind, August 23, 2011
    • 3 replies
    • 3.9k views
    • 
    • Enthalpy
    • September 2, 2011

11. The Moon: Solving Earth's Energy Crisis 1 2

    By VedekPako, February 16, 2010
    • 27 replies
    • 3.9k views
    • 
    • Ophiolite
    • September 22, 2010

12. Get ready for the landing of Perseverance ! 1 2

    By Airbrush, February 11, 2021
    • 35 replies
    • 3.9k views
    • 
    • SpaceJac111
    • May 20, 2021

13. Did wars helped us advance in technology? 1 2

    By jagadeesh, April 3, 2015
    • 25 replies
    • 3.9k views
    • 
    • pavelcherepan
    • October 15, 2015

14. 'Instability Strip' from fusion PP-to-CNO transition ?

    By Widdekind, August 6, 2011
    • 6 replies
    • 3.9k views
    • 
    • Enthalpy
    • September 29, 2015

15. The beginning and end of the universe? 1 2

    By SimonFunnell, March 31, 2016
    • 29 replies
    • 3.9k views
    • 
    • hypervalent_iodine
    • April 6, 2016

16. 5-earthmass planet found 1 2

    By Martin, January 26, 2006
    • 25 replies
    • 3.9k views
    • 
    • bascule
    • April 27, 2007

17. Lighting questions on the Perseverance landing video. 1 2

    By AlexandrKushnirtshuk, February 25, 2021
    • 41 replies
    • 3.9k views
    • 
    • Phi for All
    • February 27, 2021

18. Terraforming Mars 1 2

    By Martin or Nota, April 13, 2017
    • 32 replies
    • 3.9k views
    • 
    • mistermack
    • May 19, 2017

19. Nasa-worthy of our money? 1 2

    By TimeTraveler, October 27, 2004
    • 34 replies
    • 3.9k views
    • 
    • Ophiolite
    • February 7, 2005

20. Black Hole Theory 1 2

    By herme3, December 5, 2004
    • 32 replies
    • 3.9k views
    • 
    • 5614
    • January 10, 2005

21. Are we really... Alone? 1 2

    By Wearden, March 4, 2007
    • 31 replies
    • 3.9k views
    • 
    • Klaynos
    • April 5, 2007

22. Could the big bang still be happening?

    By cameron marical, May 12, 2009
    • 10 replies
    • 3.9k views
    • 
    • timo
    • May 15, 2009

23. The shape of light 1 2

    By cpwmatthews, May 26, 2006
    • 30 replies
    • 3.9k views
    • 
    • gcol
    • July 16, 2006

24. SUNLIGHT & THINGS 1 2

    By us.2u, November 22, 2004
    • 40 replies
    • 3.9k views
    • 
    • us.2u
    • November 28, 2004

25. Was The CMB Ever Visible?

    By Keydar, August 23, 2011
    • 7 replies
    • 3.9k views
    • 
    • MigL
    • August 25, 2011