Astronomy and Cosmology

3708 topics in this forum

1. Blocking microwave emissions from earth to outer space and vice versa

   By kos, April 10, 2016
   • 19 replies
   • 2.6k views
   • 
   • Enthalpy
   • May 18, 2016

2. Image: Saturn's sponge-like moon Hyperion

   By Robittybob1, April 29, 2015
   • 15 replies
   • 2.6k views
   • 
   • robark
   • May 17, 2015

3. ...looking back in time...

   By Manifold, September 17, 2004
   • 13 replies
   • 2.6k views
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   • Sorcerer
   • September 19, 2004

4. How can distinguish conves and concave gravitational lensing effect?

   By icarus2, December 13, 2009
   • 3 replies
   • 2.6k views
   • 
   • IM Egdall
   • February 7, 2011

5. Pluto-Charon combination. How two astronomical bodies orbit barycenter

   By Robittybob1, February 15, 2015
   • 15 replies
   • 2.5k views
   • 
   • Robittybob1
   • February 17, 2015

6. Source of Dark Matter

   By jatmacha, August 25, 2012
   • 11 replies
   • 2.5k views
   • 
   • MigL
   • September 26, 2012

7. How did we miss a planet?

   By GrandMasterK, March 22, 2016
   • 18 replies
   • 2.5k views
   • 
   • Velocity_Boy
   • April 29, 2016

8. Where would we be without our moon?

   By ScienceLord, January 15, 2014
   • 14 replies
   • 2.5k views
   • 
   • doccortex
   • January 29, 2014

9. Sunrise Times In Southern California

   By JyBrd, June 28, 2008
   • 14 replies
   • 2.5k views
   • 
   • D H
   • June 30, 2008

10. Kepler and Exoplanet Detection

    By the asinine cretin, September 8, 2011
    • 16 replies
    • 2.5k views
    • 
    • the asinine cretin
    • September 30, 2011

11. 13 billion year old GRB

    By Arch2008, April 28, 2009
    • 19 replies
    • 2.5k views
    • 
    • Martin
    • April 29, 2009

12. If planets loose their water etc???

    By pretender, April 23, 2006
    • 22 replies
    • 2.5k views
    • 
    • insane_alien
    • April 24, 2006

13. When Did US Astronauts Rescue Russian Cosmonauts?

    By PS85, November 12, 2014
    • 6 replies
    • 2.5k views
    • 
    • Carrock
    • March 10, 2017

14. Mond beats Dark Matter

    By QuantumT, July 11, 2022
    • 19 replies
    • 2.5k views
    • 
    • Markus Hanke
    • July 23, 2022

15. Big Rip vs Big Chill

    By SamBridge, April 30, 2014
    • 2 replies
    • 2.5k views
    • 
    • Mordred
    • May 7, 2014

16. Big Bang

    By JHAQ, October 26, 2006
    • 12 replies
    • 2.5k views
    • 
    • Martin
    • November 30, 2006

17. VY Canis Majoris vs The Sun? Question

    By Fanghur, April 4, 2013
    • 1 reply
    • 2.5k views
    • 
    • Chrispen Evan
    • April 4, 2013

18. Are all comprised of waves?

    By Quantum321, January 6, 2017
    • 21 replies
    • 2.5k views
    • 
    • swansont
    • February 1, 2017

19. Mars Debate

    By apollo2011, September 6, 2003
    • 17 replies
    • 2.5k views
    • 
    • Sayonara
    • December 11, 2003

20. Dimension and blackhole

    By Jacques, October 8, 2010
    • 9 replies
    • 2.5k views
    • 
    • Jacques
    • November 3, 2010

21. What is correct calculation for Moon's brightness?

    By Jurassic Park, August 23, 2021
    • 5 replies
    • 2.5k views
    • 
    • Solon
    • November 12, 2021

22. Non-spiral galaxies collision

    By MarkE, January 13, 2015
    • 10 replies
    • 2.5k views
    • 
    • MarkE
    • January 16, 2015

23. Observe the Venus Transit!

    By BSC, May 7, 2012
    • 13 replies
    • 2.5k views
    • 
    • Airbrush
    • June 6, 2012

24. Conservation of energy

    By Dart15, February 18, 2011
    • 7 replies
    • 2.5k views
    • 
    • SMF
    • February 21, 2011

25. falling for an eternity

    By gobblegobble, August 28, 2003
    • 18 replies
    • 2.5k views
    • 
    • YT2095
    • January 6, 2004