Astronomy and Space

1,481 topics in this forum

1. Effect Of A Retrograde Earth

   By petrushkagoogol, November 8, 2017
   • 6 replies
   • 1.6k views
   • 
   • petrushkagoogol
   • November 12, 2017

2. Interstellar Navigation

   By Maine farmer, November 7, 2017
   • 1 reply
   • 1.7k views
   • 
   • Buffy
   • November 7, 2017

3. Time Travel : Space Time Pin Pointing

   By LewisTheBrindley, October 22, 2017   

   • Time Travel
   • Space
   • (and 2 more)

     Tagged with:

     • Time Travel
     • Space
     • Time
     • Astronomy
   • 1 reply
   • 3.4k views
   • 
   • Vmedvil
   • October 28, 2017

4. How To Build A Time Machine 1 2 3 4

   By TomKalbfus, September 28, 2017
   • 57 replies
   • 9.8k views
   • 
   • Super Polymath
   • October 25, 2017

5. Gravitational Singularity 1 2 3 4

   By hazelm, October 3, 2017
   • 53 replies
   • 8.3k views
   • 
   • LewisTheBrindley
   • October 22, 2017

6. Just A Short Meteor Quiz

   By Deepwater6, October 21, 2017
   • 0 replies
   • 1.3k views
   • 
   • Deepwater6
   • October 21, 2017

7. Dynamic Dark Energy

   By hazelm, October 4, 2017
   • 8 replies
   • 2k views
   • 
   • TomKalbfus
   • October 19, 2017

8. Elon Musk With New Spacex Tech Says Costs Will Drop By A Factor Of 100 1 2

   By TomKalbfus, October 1, 2017   

   • Space
   • 24 replies
   • 4.8k views
   • 
   • TomKalbfus
   • October 18, 2017

9. Terraforming Venus 1 2 3

   By Moontanman, March 29, 2008
   • 39 replies
   • 9.7k views
   • 
   • TomKalbfus
   • October 11, 2017

10. Zubrin Critiques Elon's Mars Plan

    By Eclipse Now, March 22, 2017
    • 9 replies
    • 3.8k views
    • 
    • TomKalbfus
    • October 10, 2017

11. From Whence Comes Gold?

    By hazelm, August 5, 2017
    • 8 replies
    • 2.5k views
    • 
    • hazelm
    • October 8, 2017

12. Does "magmatter" Exist?

    By TomKalbfus, October 7, 2017
    • 2 replies
    • 2.6k views
    • 
    • TomKalbfus
    • October 7, 2017

13. Lunar Hotel

    By TomKalbfus, October 4, 2017   

    • Space Tourism
    • 2 replies
    • 1.7k views
    • 
    • TomKalbfus
    • October 4, 2017

14. Making The Moon Into A Bernal Sphere

    By CraigD, November 14, 2015
    • 1 reply
    • 3.3k views
    • 
    • TomKalbfus
    • September 29, 2017

15. Tidally Lock Venus To Partially Terraform?

    By Eclipse Now, July 18, 2017
    • 1 reply
    • 2k views
    • 
    • TomKalbfus
    • September 29, 2017

16. Colonize Mercury 1 2

    By moonguy, September 21, 2013
    • 19 replies
    • 7.2k views
    • 
    • TomKalbfus
    • September 27, 2017

17. Is It An Asteroid Or A Comet? Or A Future Planet?

    By hazelm, September 21, 2017
    • 0 replies
    • 1.3k views
    • 
    • hazelm
    • September 21, 2017

18. Another Source Of Cosmic Rays 1 2

    By hazelm, September 5, 2017
    • 25 replies
    • 4k views
    • 
    • hazelm
    • September 8, 2017

19. Does a shadow have mass? 1 2 3 4

    By Zohaar818, May 23, 2005
    • 52 replies
    • 27.8k views
    • 
    • exchemist
    • September 2, 2017

20. 2017 Eclipse 1 2

    By Deepwater6, February 19, 2017
    • 28 replies
    • 4.6k views
    • 
    • Deepwater6
    • August 29, 2017

21. Eclipse In St Louis Area

    By hazelm, August 22, 2017
    • 2 replies
    • 1.4k views
    • 
    • hazelm
    • August 22, 2017

22. Should We Try To Contact With Aliens?

    By whocares386, August 21, 2017
    • 1 reply
    • 1.5k views
    • 
    • Buffy
    • August 21, 2017

23. Eclipse Timing

    By hazelm, August 19, 2017
    • 6 replies
    • 2.5k views
    • 
    • Buffy
    • August 20, 2017

24. Safely Viewing An Eclipse

    By Maine farmer, August 18, 2017
    • 5 replies
    • 2.2k views
    • 
    • Buffy
    • August 19, 2017

25. Photon Latency Error In Solar And Lunar Eclipses

    By petrushkagoogol, June 24, 2017
    • 1 reply
    • 1.7k views
    • 
    • spartan45
    • August 18, 2017