Astronomy and Cosmology

3708 topics in this forum

1. 5 new Exoplanets!

   By Arch2008, June 18, 2009
   • 19 replies
   • 3.1k views
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   • Airbrush
   • January 6, 2010

2. interplanetary space craft 1 2

   By CPL.Luke, August 17, 2005
   • 29 replies
   • 3.1k views
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   • CPL.Luke
   • August 21, 2005

3. Oldest spiral galaxy challenge to established age of universe? 1 2

   By aramis720, November 5, 2017
   • 28 replies
   • 3k views
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   • Outrider
   • November 19, 2017

4. Why is CMB visible through cosmic 'Dark Ages' ?

   By Widdekind, February 13, 2011
   • 9 replies
   • 3k views
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   • imatfaal
   • February 16, 2011

5. How do sling shot space craft, manage to gain energy from Planets.

   By Mike Smith Cosmos, August 3, 2013
   • 10 replies
   • 3k views
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   • Janus
   • August 8, 2013

6. Does outer space have drag?

   By visinedrops, June 15, 2020
   • 18 replies
   • 3k views
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   • J.C.MacSwell
   • June 17, 2020

7. Regarding the Big Bang...

   By Arevalo, June 27, 2013
   • 16 replies
   • 3k views
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   • a_lexios
   • August 4, 2013

8. Migrating Hot Jupiters 1 2

   By frankglennjacobs@gmail.com, April 18, 2017
   • 26 replies
   • 3k views
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   • Mordred
   • April 25, 2017

9. Big Bang Foolishness

   By ydoaPs, January 21, 2007
   • 14 replies
   • 3k views
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   • RoyalXBlood
   • February 21, 2007

10. Going through a Black Hole

    By MolotovCocktail, March 2, 2007
    • 19 replies
    • 3k views
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    • dstebbins
    • March 24, 2007

11. Weight Loss during Solar Eclipse

    By Encryptor, October 16, 2017
    • 6 replies
    • 3k views
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    • swansont
    • February 15, 2022

12. How come it's usually stated earth's axial tilt is 23.5 degrees?

    By mzatanoskas, November 15, 2009
    • 6 replies
    • 3k views
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    • Ophiolite
    • November 15, 2009

13. Gravity and pressure.

    By Гера�им, June 30, 2014
    • 20 replies
    • 3k views
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    • Mordred
    • July 18, 2014

14. Photons & Cosmic Expansion 1 2

    By QuantumT, February 21, 2019
    • 40 replies
    • 3k views
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    • StringJunky
    • February 25, 2019

15. Cosmological natural selection

    By bascule, June 28, 2007
    • 16 replies
    • 3k views
    • 
    • Widdekind
    • July 25, 2011

16. Space Ends

    By spaceends, December 24, 2009
    • 17 replies
    • 3k views
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    • swansont
    • December 28, 2009

17. Exclusive: Grave doubts over LIGO’s discovery of gravitational waves

    By beecee, November 16, 2018
    • 19 replies
    • 3k views
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    • beecee
    • January 13, 2019

18. Dark matter dark energy conundrum

    By wallflash, April 10, 2017
    • 20 replies
    • 3k views
    • 
    • beecee
    • May 1, 2018

19. Energy contained in the magnetic field 1 2

    By Danijel Gorupec, January 1, 2019
    • 36 replies
    • 3k views
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    • Phi for All
    • January 15, 2019

20. Does Universe expand?

    By NiVekeN, August 4, 2009
    • 23 replies
    • 3k views
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    • Sisyphus
    • August 6, 2009

21. Nukes in space. 1 2

    By Leader Bee, July 7, 2009
    • 26 replies
    • 3k views
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    • insane_alien
    • July 8, 2009

22. no gravity, no space time

    By hewj11, March 5, 2010
    • 20 replies
    • 3k views
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    • michel123456
    • March 13, 2010

23. Pluto the Dwarf Planet. Why Dwarf? Why Not? 1 2

    By Nicholas Kang, June 11, 2014
    • 26 replies
    • 3k views
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    • Nicholas Kang
    • June 19, 2014

24. Collision during relatively fast interstellar travel

    By Ivan Tuzikov, February 16, 2016
    • 21 replies
    • 3k views
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    • TakenItSeriously
    • February 19, 2016

25. ETs Within 1,000 Light Years?

    By Airbrush, May 25, 2009
    • 20 replies
    • 3k views
    • 
    • Martin
    • May 29, 2009