Science & Spaceflight

8,375 topics in this forum

1. Serious Scientific Answers to Absurd Hypothetical questions 1 2 3 4 33

   By DAL59, November 3, 2017
   • 823 replies
   • 67.7k views
   • 
   • Gargamel
   • May 19, 2019

2. Mars Colonization Discussion Thread 1 2 3 4 33

   By NSEP, October 5, 2017   

   • mars
   • colonization
   • (and 1 more)

      Tagged with:

     • mars
     • colonization
     • discussion
   • 812 replies
   • 52.6k views
   • 
   • StrandedonEarth
   • February 16, 2020

3. [space] Is Mars-one a scam? 1 2 3 4 30

   By hugix, August 21, 2013
   • 744 replies
   • 118.8k views
   • 
   • Diche Bach
   • September 18, 2016

4. NASA Human Landing System 1 2 3 4 28

   By tater, February 14, 2019
   • 681 replies
   • 43.9k views
   • 
   • kerbiloid
   • December 8, 2022

5. Arianespace launch thread 1 2 3 4 28

   By insert_name, December 10, 2017   

   • ariane
   • vega
   • (and 1 more)

      Tagged with:

     • ariane
     • vega
     • esa
   • 681 replies
   • 53.4k views
   • 
   • tater
   • Saturday at 05:43 PM

6. What is your biggest science pet peeve in movies? 1 2 3 4 27

   By todofwar, April 12, 2016
   • 651 replies
   • 55.1k views
   • 
   • kerbiloid
   • January 7, 2017

7. Virgin Galactic, Branson's space venture 1 2 3 4 26

   By PB666, December 4, 2015   

   • space flight
   • private
   • (and 1 more)

      Tagged with:

     • space flight
     • private
     • branson
   • 642 replies
   • 44.5k views
   • 
   • RCgothic
   • December 4, 2023

8. Starlink Thread (split from SpaceX) 1 2 3 4 26

   By DAL59, February 17, 2018
   • 633 replies
   • 44.3k views
   • 
   • darthgently
   • April 8

9. Is this alternate solar system possible? 1 2 3 4 26

   By ChrisSpace, December 6, 2015   

   • solar system
   • alternate history
   • (and 1 more)

      Tagged with:

     • solar system
     • alternate history
     • physics
   • 632 replies
   • 44.2k views
   • 
   • fredinno
   • December 11, 2016

10. Mars Rover Perseverance Discussion Thread 1 2 3 4 25

    By cubinator, July 28, 2020
    • 620 replies
    • 42.6k views
    • 
    • grawl
    • February 26

11. Dawn at Ceres Thread 1 2 3 4 25

    By Frida Space, January 19, 2015
    • 613 replies
    • 86.3k views
    • 
    • VaPaL
    • July 4, 2018

12. This Day in Spaceflight History 1 2 3 4 25

    By The Raging Sandwich, July 17, 2016   

    • spaceflight
    • history
    • 604 replies
    • 86.5k views
    • 
    • PakledHostage
    • May 22, 2019

13. Best energy alternatives to stop global warming 1 2 3 4 23

    By AngelLestat, June 14, 2014
    • 551 replies
    • 48.5k views
    • 
    • SargeRho
    • July 2, 2014

14. Project Orion: A discussion of Science and Science Fiction 1 2 3 4 21

    By Spacescifi, December 18, 2020
    • 522 replies
    • 24.7k views
    • 
    • Spacescifi
    • December 21, 2022

15. Boring company 1 2 3 4 20

    By Mad Rocket Scientist, April 28, 2017
    • 490 replies
    • 40.4k views
    • 
    • kerbiloid
    • July 23, 2020

16. So, you have a plane on a conveyor belt... 1 2 3 4 19

    By Randazzo, March 25, 2015
    • 458 replies
    • 38.9k views
    • 
    • peadar1987
    • June 27, 2018

17. Red Dragon confirmed!! 1 2 3 4 19

    By MajorLeaugeRocketScience, April 27, 2016   

    • spacex
    • red dragon
    • (and 1 more)

       Tagged with:

      • spacex
      • red dragon
      • falcon heavy
    • 453 replies
    • 39.3k views
    • 
    • Virtual
    • September 23, 2016

18. totm oct 2023 NASA's OSIRIS-REx 1 2 3 4 18

    By archenemy_6, May 21, 2016
    • 449 replies
    • 38.2k views
    • 
    • IonStorm
    • May 13

19. Colonization Discussion Thread (split from SpaceX) 1 2 3 4 18

    By mikegarrison, September 29, 2017   

    • mars
    • colonization
    • (and 3 more)

       Tagged with:

      • mars
      • colonization
      • spacex
      • oneill cylinder
      • asteroids
    • 442 replies
    • 24.9k views
    • 
    • Spaceception
    • November 8, 2018

20. Could a Gyroscopic inertial thruster ever work? 1 2 3 4 18

    By FREEFALL1984, March 12, 2014
    • 437 replies
    • 58.4k views
    • 
    • N_las
    • November 20, 2014

21. Moon landing 2013 (Chang'e 3) 1 2 3 4 18

    By czokletmuss, September 16, 2013
    • 432 replies
    • 72k views
    • 
    • Lohan2008
    • February 20, 2014

22. Tesla Thread 1 2 3 4 18

    By GearsNSuch, January 14, 2020
    • 429 replies
    • 32.8k views
    • 
    • tater
    • May 13

23. ISS Discussion Thread 1 2 3 4 17

    By NSEP, October 31, 2018
    • 411 replies
    • 28.7k views
    • 
    • tater
    • Yesterday at 05:18 AM

24. ISRO Discussion Thread 1 2 3 4 17

    By TheEpicSquared, June 4, 2017   

    • isro
    • 405 replies
    • 33.8k views
    • 
    • Minmus Taster
    • May 14

25. Astronomers may have found giant alien 'megastructures' orbiting a star in the Milky Way 1 2 3 4 16

    By andrew123, October 15, 2015
    • 393 replies
    • 46.2k views
    • 
    • YNM
    • February 3, 2018