Science & Spaceflight

8,479 topics in this forum

1. Most enviromentally friendly Propellant choices 1 2

   By Spacescifi, April 10, 2020
   • 30 replies
   • 2.1k views
   • 
   • farmerben
   • April 15, 2020

2. Aerospiked recoiless rifle

   By farmerben, April 13, 2020
   • 2 replies
   • 431 views
   • 
   • farmerben
   • April 13, 2020

3. Battle Of The Scifi Drives

   By Spacescifi, April 13, 2020
   • 1 reply
   • 382 views
   • 
   • kerbiloid
   • April 13, 2020

4. Out of Control Candle 1 2 3

   By Starwhip, July 18, 2015
   • 71 replies
   • 10.7k views
   • 
   • RCgothic
   • April 12, 2020

5. The Space Review: "Why a business case for Mars settlement is not required" 1 2 3

   By DDE, April 8, 2020   

   • thespacereview
   • 50 replies
   • 2.9k views
   • 
   • DDE
   • April 10, 2020

6. Something I struggle with: orbital orientation

   By JoeSchmuckatelli, March 24, 2020
   • 21 replies
   • 1.3k views
   • 
   • JoeSchmuckatelli
   • April 10, 2020

7. Do You Think There Are Planets Around Alpha Centauri?

   By caballerodiez, April 9, 2020
   • 6 replies
   • 839 views
   • 
   • wafflemoder
   • April 10, 2020

8. The Many Applications Of Antimatter

   By Spacescifi, April 9, 2020
   • 11 replies
   • 1k views
   • 
   • wafflemoder
   • April 10, 2020

9. did dark matter eat all the antiquarks?

   By Nuke, March 27, 2020
   • 17 replies
   • 1.6k views
   • 
   • farmerben
   • April 8, 2020

10. How Far Will A Pusher Plate Take You? 1 2

    By Spacescifi, March 25, 2020
    • 27 replies
    • 2k views
    • 
    • Bill Phil
    • April 8, 2020

11. Carbon Dioxide RCS

    By Misguided Kerbal, April 8, 2020   

    • rcs
    • future
    • 7 replies
    • 983 views
    • 
    • DDE
    • April 8, 2020

12. C/2019 Y4 (ATLAS) might become a naked-eye comet 1 2

    By ProtoJeb21, March 28, 2020
    • 25 replies
    • 2.2k views
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    • ProtoJeb21
    • April 7, 2020

13. Event Horizon Telescope published its findings on 3C 279

    By Delay, April 7, 2020
    • 0 replies
    • 362 views
    • 
    • Delay
    • April 7, 2020

14. Magnetically increased Thrust For Lightcraft?

    By Spacescifi, April 6, 2020
    • 4 replies
    • 553 views
    • 
    • magnemoe
    • April 6, 2020

15. explanations for the oberth effect

    By jevry, April 2, 2020   

    • question
    • 11 replies
    • 1.1k views
    • 
    • magnemoe
    • April 6, 2020

16. A Combined Approach Better Than SSTO's?

    By Spacescifi, April 4, 2020
    • 19 replies
    • 1.3k views
    • 
    • Selective Genius
    • April 6, 2020

17. Alternate Nuke Pusher Plate Shapes? 1 2

    By Spacescifi, March 17, 2020
    • 40 replies
    • 2.8k views
    • 
    • farmerben
    • April 2, 2020

18. Quebec sure does have a lot of wierd circles...

    By Pds314, February 29, 2020
    • 15 replies
    • 1.5k views
    • 
    • farmerben
    • April 2, 2020

19. Lithium+Fluorine+Hydrogen, why not? 1 2

    By RuBisCO, March 28, 2020
    • 33 replies
    • 4.7k views
    • 
    • p1t1o
    • April 1, 2020

20. Exoplanets/exomoon Discussion Thread

    By VoidCosmos, March 13, 2020
    • 4 replies
    • 570 views
    • 
    • StrandedonEarth
    • April 1, 2020

21. How Do You Navigate My Scifi Starship?

    By Spacescifi, March 29, 2020
    • 22 replies
    • 1k views
    • 
    • kerbiloid
    • March 31, 2020

22. Are Linear Wedge Shock Cones Practical?

    By Spacescifi, March 29, 2020
    • 7 replies
    • 659 views
    • 
    • Spacescifi
    • March 30, 2020

23. Brain Break: Anyone Willing to entertain another (strange?) gravity / orbital question?

    By JoeSchmuckatelli, March 26, 2020
    • 9 replies
    • 676 views
    • 
    • magnemoe
    • March 26, 2020

24. Suborbital Reusable NTTR Boosters

    By Spacescifi, March 24, 2020
    • 4 replies
    • 484 views
    • 
    • sevenperforce
    • March 24, 2020

25. NASA is suspending development of its future deep-space rocket ( during coronavirus pandemic )

    By pmborg, March 20, 2020
    • 13 replies
    • 1k views
    • 
    • DDE
    • March 22, 2020