Astronomy and Cosmology

3708 topics in this forum

1. Is the earth pulled around by the moon?

   By zensunni, September 14, 2008
   • 14 replies
   • 2.5k views
   • 
   • interstellar
   • November 8, 2008

2. How hungry are black holes

   By Johanluus, March 12, 2010
   • 23 replies
   • 2.5k views
   • 
   • Arch2008
   • March 15, 2010

3. Moon Explosion and Radiation (For Sci-Fi Book)

   By Mr Ask, July 20, 2017
   • 20 replies
   • 2.5k views
   • 
   • Damateur
   • July 30, 2017

4. the fabric of the space-time continuum

   By japan rocks/andromeda, October 4, 2010
   • 7 replies
   • 2.5k views
   • 
   • imatfaal
   • October 31, 2010

5. World Jump Day

   By Thomas Wood, March 31, 2005
   • 12 replies
   • 2.5k views
   • 
   • Guest
   • April 2, 2005

6. nearby exoplanet in habitable zone

   By Martin, June 28, 2005
   • 21 replies
   • 2.5k views
   • 
   • Martin
   • June 30, 2005

7. Telescope to see a person on another planet

   By kos, June 27, 2015
   • 16 replies
   • 2.5k views
   • 
   • LaurieAG
   • June 29, 2015

8. Time-Lapse Movies of Crab Nebula

   By blike, September 21, 2002
   • 3 replies
   • 2.5k views
   • 
   • Sayonara
   • June 24, 2003

9. a couple questions about stars

   By brandoncotten, December 5, 2012
   • 14 replies
   • 2.5k views
   • 
   • mathematic
   • December 5, 2012

10. How close is too close?

    By TransformerRobot, December 14, 2014
    • 19 replies
    • 2.5k views
    • 
    • mothythewso
    • January 19, 2015

11. Solar sails to increase the spin of the moon.

    By aman, July 24, 2002
    • 15 replies
    • 2.5k views
    • 
    • aman
    • August 10, 2002

12. Formulae in simple english?

    By Rasori, December 14, 2003
    • 17 replies
    • 2.5k views
    • 
    • YT2095
    • January 14, 2004

13. question!

    By Erador, February 17, 2004
    • 17 replies
    • 2.5k views
    • 
    • JaKiri
    • February 19, 2004

14. Worth of the sun?

    By Encryptor, September 11, 2017
    • 17 replies
    • 2.5k views
    • 
    • Encryptor
    • September 18, 2017

15. Sling-shotting Energy

    By Oddt, May 9, 2011
    • 11 replies
    • 2.5k views
    • 
    • Spyman
    • May 14, 2011

16. During inflation how did spacetime 'push' particles

    By Quantum321, November 24, 2016
    • 23 replies
    • 2.5k views
    • 
    • Mordred
    • November 28, 2016

17. Apparent Red shift in a discrete Newtonian frame

    By LaurieAG, June 5, 2013
    • 7 replies
    • 2.5k views
    • 
    • LaurieAG
    • March 30, 2014

18. Can Light Actually Slow Down?

    By CameronFriday, April 17, 2010
    • 13 replies
    • 2.5k views
    • 
    • D H
    • April 21, 2010

19. Why Don't All Moons Orbit Retrograde?

    By Elen Sila, September 5, 2011
    • 11 replies
    • 2.5k views
    • 
    • matterdoc
    • October 18, 2011

20. could dark matter be nothing; literally?

    By 36grit, November 13, 2012
    • 18 replies
    • 2.5k views
    • 
    • alpha2cen
    • December 3, 2012

21. Can the edge of the universe even been seen?

    By The Holy Mol, December 20, 2004
    • 15 replies
    • 2.5k views
    • 
    • alt_f13
    • December 25, 2004

22. The Big Bang: Was there a singularity?

    By Sorcerer, March 12, 2015
    • 17 replies
    • 2.5k views
    • 
    • Phi for All
    • March 13, 2015

23. Life Detected on Titan - What are your thoughts?

    By iNow, June 6, 2010
    • 18 replies
    • 2.4k views
    • 
    • Realitycheck
    • June 14, 2010

24. HELP ! construction of payload

    By Christiana, February 17, 2009
    • 19 replies
    • 2.4k views
    • 
    • lakmilis
    • March 27, 2009

25. A doubt!

    By chinmayrshah, August 3, 2011
    • 14 replies
    • 2.4k views
    • 
    • ajb
    • August 10, 2011